10 Best Magnesium Supplements

Magnesium supplements: what to look for

Start with the Supplement Facts panel. A headline such as “500 mg magnesium complex” may describe the weight of the magnesium compounds, not 500 mg of elemental magnesium. Other products clearly distinguish compound weight from elemental magnesium, while some give inconsistent figures across their own pages or disclose only a proprietary blend. The elemental amount is the number to use when comparing products and calculating total supplemental intake. The U.S. adult upper limit for magnesium from supplements and medicines is **350 mg per day**. Several supplied products exceed that amount, and others reach it or come close. More magnesium is not automatically better: diarrhea, nausea, and abdominal cramping become more likely as supplemental intake rises.

Check the serving directions, not just the amount per capsule or gummy. A product may remain below the adult upper limit at one scoop or one capsule but exceed it if directions permit an additional serving. Children have lower age-specific limits, so adult products and adult doses should not be transferred to children. Gummy buyers should also inspect sugar alcohols such as maltitol and ingredients such as chicory root fiber, which may cause gas, cramping, or loose stools even when the product has no added sugar. Capsules should be checked for gelatin, while vegetarian or vegan claims should be confirmed against the capsule and inactive-ingredient list.

For quality, a generic “third-party tested” or “GMP certified” statement is not the same as accessible finished-product evidence. The strongest supplied example was a current, lot-linked report that identifies the product lot and laboratory and reports meaningful potency, identity, heavy-metal, and microbial testing. A credible independent finished-product listing should be checked in public programs such as the **USP Verified Dietary Supplements list, NSF Certified Dietary Supplements database, NSF Certified for Sport, ConsumerLab’s quality program, or Informed Sport/Informed Choice** when applicable. Facility-level GMP registration is useful for manufacturing accountability, but it does not independently certify what is in the bottle. Expired, historical, or unmatched testing is weaker evidence than a current report tied to the buyer’s lot.

Finally, look for a responsible company, U.S. contact information, lot and expiry details, and a label that names every active and inactive ingredient. Packaging claims should be specific: container material, recycled content, refill options, or locally usable recycling instructions are more meaningful than a general “green” statement.

Across the supplied products, recurring safety caveats are important. People with kidney impairment should not self-direct supplemental magnesium. Magnesium can interfere with absorption of oral bisphosphonates and tetracycline or quinolone antibiotics, so pharmacist or clinician advice on timing may be needed. Extra ingredients create additional concerns: vitamin D3 doses above the adult upper limit, zinc at or above its upper limit, vitamin K2 with warfarin or other vitamin-K-sensitive anticoagulants, and botanicals or sleep ingredients with medicine interactions. High-dose products, children’s products with unclear elemental dosing, and formulas containing ashwagandha or 5-HTP warrant particular caution. Persistent insomnia, cramps, weakness, rhythm symptoms, or suspected deficiency should not be treated solely through self-selection of a supplement.

Integrity

Full reviews

#1 - Best Overall

NatureBell Magnesium Complex Supplement 500mg

Buyer Score 98/100Integrity Score 73/100NatureBell

Overview

This is a 300-capsule magnesium supplement intended for adults, with one capsule presented by the manufacturer as a daily serving. Its Supplement Facts panel identifies 102 mg of elemental magnesium per capsule, or 24% of the Daily Value, from a 500 mg blend of ten magnesium compounds. Those compounds are individually named at 50 mg each, including glycinate, citrate, malate, taurate, oxide, and carbonate. The important distinction is that 500 mg is the total compound blend weight, not 500 mg of elemental magnesium. The label panel makes the 102 mg elemental amount clear, but the front label and product page emphasize “500 mg” and describe it as full elemental magnesium, which can confuse dose interpretation. The formula contains no added vitamins, herbs, or sleep ingredients. Its public ingredient panel lists rice flour, magnesium stearate, silicon dioxide, and a gelatin capsule.

What works

• The Supplement Facts panel clearly states 102 mg of elemental magnesium per capsule, below the 350 mg adult upper limit for supplemental magnesium.
• All ten magnesium source compounds and their 50 mg blend weights are individually disclosed on the public label image.
• There are no added vitamins, botanicals, stimulants, or sleep actives to stack with other supplements.
• The public label discloses the capsule and inactive ingredients, including gelatin, rice flour, magnesium stearate, and silicon dioxide.
• NatureBell provides a U.S. office address and online customer contact route, giving buyers a traceable company contact.

What does not

• The prominent 500 mg wording conflicts with the Supplement Facts panel, which lists 102 mg of elemental magnesium per capsule. This is a meaningful clarity problem, not merely missing evidence.
• The product page claims chelation, maximum bioavailability, and gentle digestion despite including magnesium oxide and magnesium carbonate. No product-specific human absorption comparison was located.
• The public product materials do not provide usable kidney-disease cautions or specific dose-separation directions for bisphosphonates, tetracycline antibiotics, or quinolone antibiotics.
• NatureBell states that the product is third-party lab tested, but no current lot-matched certificate of analysis or named laboratory report was publicly available for review.
• No current public listing was located for this exact finished product in the reviewed USP or NSF dietary-supplement certification registries.

Who is it for

This product fits an adult seeking a modest, clearly quantified supplemental magnesium amount rather than a high-dose magnesium product. The 102 mg elemental dose is below the adult supplemental upper limit of 350 mg per day and may suit someone who wants to add magnesium while also getting it from food. It also suits buyers who prefer a simple magnesium-only active formula and accept gelatin capsules. The 300-capsule format is designed for a long daily supply, if one capsule per day is appropriate for the individual.

Who is it not for

It is not a good fit for people who need a clinician-directed magnesium dose, have reduced kidney function, or take medicines whose absorption magnesium can impair. This includes oral bisphosphonates and tetracycline or quinolone antibiotics, which require carefully timed separation. People who avoid animal-derived gelatin should choose a vegetarian capsule. It is also unsuitable for anyone expecting 500 mg of elemental magnesium, since the public Supplement Facts panel lists 102 mg per capsule. People prone to diarrhea or abdominal cramping should introduce magnesium cautiously and seek professional guidance if symptoms occur.

Integrity

The public Supplement Facts panel is useful in one respect, it separates 102 mg of elemental magnesium from the 500 mg total blend and names all ten compounds. It also identifies rice flour, magnesium stearate, silicon dioxide, and gelatin. Magnesium supplements can cause diarrhea, nausea, and abdominal cramping at higher supplemental intakes. The public materials reviewed did not provide the kidney-risk and medication-timing warnings that would make the product safer for higher-risk users. NatureBell states that this product is made in the USA, cGMP verified, double sealed, and third-party tested. These are manufacturer claims, not publicly documented finished-product certification or lot-specific testing evidence. The bottle shown is an amber plastic container, but no resin code, recycled-content percentage, refill option, or locally usable recycling instructions were provided. No product-specific FDA recall or warning-letter result was located in the reviewed public sources.

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#2 - Hot Deal

BiOptimizers Magnesium Breakthrough 4.0 Supplement

Buyer Score 95/100Integrity Score 69/100BIOptimizers

Overview

This is a 60-capsule magnesium supplement intended for two capsules daily, commonly with an evening meal. The manufacturer states that this daily serving supplies 500 mg elemental magnesium from a seven-form proprietary blend, plus 2 mg vitamin B6, 1 mg manganese, and a 10 mg humic and fulvic blend. The individual amounts of the seven magnesium forms are not disclosed. The 500 mg supplemental magnesium dose is clearly stated, but it exceeds the U.S. adult tolerable upper intake level of 350 mg per day from supplements and medicines. Diarrhea, nausea, and cramping are foreseeable effects at higher supplemental doses. Evidence for magnesium improving sleep or calm is mixed and generally low certainty, rather than specific to this exact multi-form formula. Historical batch testing appears in the Informed Sport registry, but the product was withdrawn from that program on August 10, 2025.

What works

• The label states total elemental magnesium, rather than presenting only the much larger weight of magnesium compounds.
• The seven named magnesium sources, vitamin B6, manganese, humic and fulvic blend, capsule shell, and flow agents are disclosed.
• The added vitamin B6 and manganese quantities are modest, at 2 mg and 1 mg per daily serving.
• A responsible U.S. company address and consumer phone contact are identifiable on the product label.
• Informed Sport publicly listed tested batches for this capsule product before the program withdrawal.

What does not

• The labeled 500 mg daily supplemental magnesium dose exceeds the 350 mg adult U.S. upper intake level for magnesium from supplements and medicines.
• The precaution is generic. It does not specifically flag kidney impairment or give the timing needed with oral bisphosphonates, tetracycline antibiotics, and quinolone antibiotics.
• The product does not disclose how much magnesium comes from each form, so buyers cannot match a specific magnesium salt to the research or to their tolerability needs.
• No current, bottle-lot-specific certificate of analysis showing identity, heavy metals, microbes, and undeclared-substance testing was located.
• Sleep, cognitive, and broad whole-body marketing claims are more confident than the mixed, formulation-specific human evidence supports.

Who is it for

This product is most suited to an adult who has already discussed magnesium intake with a clinician, wants a capsule rather than a flavored powder or gummy, and specifically wants a high total magnesium serving split across several named forms. It may also suit a buyer who values a fully disclosed basic capsule formula with no added sweeteners. The user should be prepared to reduce or stop use if loose stools, nausea, or abdominal cramping occur, and should account for magnesium from other supplements, antacids, or laxatives.

Who is it not for

It is not well suited to children, adolescents, or adults who want to remain within the U.S. supplemental magnesium upper intake level. People with kidney impairment or kidney failure should not self-start this high supplemental dose because magnesium toxicity risk rises when renal elimination is reduced. It is also a poor fit for people taking oral bisphosphonates, tetracycline antibiotics, or quinolone antibiotics unless a pharmacist or prescriber provides a dosing schedule. Anyone seeking a product with current lot-specific purity reports or an active independent certification should choose a product with those records publicly available.

Integrity

The product identifies a U.S. responsible company and provides a consumer contact, while the capsule formula lists its added nutrients and inactive ingredients. The NIH notes that high supplemental magnesium commonly causes gastrointestinal effects and that impaired kidney function increases toxicity risk. The product's generic caution does not provide the specific kidney or medication-separation guidance that higher-risk users need. Informed Sport records show historically tested batches, including batches with 2026 expirations, but the program states that the product was voluntarily withdrawn on August 10, 2025 and later-produced batches are not tested. ConsumerLab included the product in magnesium testing, but publicly available material does not disclose its individual result. A Canadian Type III recall published January 19, 2026 concerned residue on capsules in a distinct 250 mg strength and one lot, 2504909. No evidence verified that this was the U.S. 60-capsule unit. Packaging appears to be a conventional plastic supplement bottle, with no verified recycled-content, refill, or disposal instructions located.

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#3

Etta Vita Magnesium Glycinate Complex

Buyer Score 93/100Integrity Score 63/100Etta Vita

Overview

This is a 60-capsule magnesium complex intended for adults, with directions to take two capsules daily, with or without food, either during the day or before bed. The listing describes a 500 mg multi-form magnesium complex containing glycinate, citrate, malate, taurate, gluconate, carbonate, and orotate, plus vegan vitamin D3, activated vitamin B6, manganese, and astragalus. The most important limitation is that the available product information does not provide a readable Supplement Facts panel with elemental magnesium or the amounts of the added nutrients and botanical. Therefore, the advertised 500 mg cannot be confirmed as the elemental magnesium dose. The Amazon page also carries a California Proposition 65 warning for lead and lead compounds, while no current lot-specific certificate of analysis was publicly available during verification.

What works

• Two-capsule daily directions and the 60-capsule count provide a clear 30-day routine.
• The ingredient list identifies seven magnesium salts rather than naming only a generic magnesium blend.
• The manufacturer states that the capsule is vegan and free of gelatin, dairy, lactose, gluten, soy, peanuts, and tree nuts.
• The listed magnesium forms include citrate and glycinate, forms that dissolve more readily than magnesium oxide, although absorption of this exact blend was not tested publicly.

What does not

• A California Proposition 65 warning says the product can expose users to lead or lead compounds. The warning does not quantify exposure.
• No public lot-matched test report was found to verify lead, other heavy metals, microbes, identity, or label potency for this finished product.
• The public listing does not disclose elemental magnesium, vitamin D3, vitamin B6, manganese, or astragalus amounts, so dose safety cannot be independently assessed.
• The listing calls the product filler-free, but its ingredient list includes rice flour. This is a direct marketing contradiction.
• Directions do not provide kidney-disease cautions or timing instructions for bisphosphonates, tetracycline antibiotics, or quinolone antibiotics.

Who is it for

This product is most relevant to an adult who wants a capsule-based, once-daily magnesium routine and specifically prefers a manufacturer-stated vegan, gelatin-free format. It may suit someone who understands that the advertised 500 mg refers to a magnesium complex rather than a confirmed elemental magnesium dose, and who is not trying to target a precisely dosed nutrient regimen. It is also better suited to buyers willing to treat calm, sleep, and muscle-support language as general support claims rather than predictable outcomes.

Who is it not for

It is not appropriate for people with impaired kidney function or kidney failure unless a clinician approves it, because magnesium clearance can be reduced. People taking oral bisphosphonates, tetracycline antibiotics, or quinolone antibiotics should choose a product with clear dose-separation instructions or seek pharmacist advice. It also does not fit buyers who need verified elemental magnesium, vitamin D, B6, manganese, or astragalus doses, or those who want lot-specific heavy-metal results. California consumers concerned by the listed lead warning should consider that disclosure carefully.

Integrity

The formula lists seven magnesium sources and adds vitamin D3 from lichen, P5P vitamin B6, manganese, astragalus, rice flour, and a veggie capsule. The manufacturer makes vegan, allergen, made-in-USA, GMP-facility, and third-party-tested claims. However, no public registry entry was found for finished-product certification through major independent programs, and no lot-specific certificate of analysis was available to substantiate the testing claim. The product page includes a California Proposition 65 warning for lead and lead compounds. That warning is a material safety disclosure, not a measurement of exposure, but it is especially important given the absence of public batch testing. No specific container resin, recycled content, refill system, or locally usable recycling instructions were disclosed. Packaging environmental impact therefore cannot be meaningfully assessed from the available evidence.

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#4

FarmHaven Magnesium Glycinate & Malate Complex with D3

Buyer Score 88/100Integrity Score 73/100FarmHaven

Overview

FarmHaven Magnesium Complex is a 120-capsule adult supplement intended as two vegetarian capsules once daily with a meal, providing 60 servings. Independently reproduced label data identifies 250 mg elemental magnesium from magnesium glycinate and magnesium malate, plus 20 mcg vitamin D3. It also lists 15 mg each of organic broccoli, kale, pumpkin seed, and spinach. The 250 mg supplemental magnesium dose is below the U.S. adult upper limit of 350 mg per day from supplements and medicines, although magnesium can still cause diarrhea, nausea, or cramping. The manufacturer presents the formula for muscle, nerve, bone, sleep, energy, and immune support. A public Labdoor record confirms the product had third-party certification coverage, but the current magnesium ranking identifies that certification as expired, so it is not current lot-specific assurance.

What works

• The stated 250 mg elemental magnesium amount is clear and remains below the U.S. adult supplemental upper limit.
• Vitamin D3 is disclosed as 20 mcg per daily serving, which equals the adult Daily Value.
• The formula and serving directions are concrete, including the two-capsule daily serving and named magnesium sources.
• A public Labdoor record documents historical third-party certification for this finished product.

What does not

• No current bottle-matched certificate of analysis was publicly accessible for heavy metals, microbes, identity, or potency.
• The label names magnesium glycinate and malate but does not disclose how the 250 mg is divided between them.
• Usable label warnings for kidney disease and medicine timing were not evident. Magnesium can reduce absorption of oral bisphosphonates and certain antibiotics.
• Claims that it prevents laxative effects, relieves cramps, improves sleep, mood, headaches, and immunity are broader than the evidence established for this exact formula and dose.
• No specific recycled-content, refill, material, or local recycling guidance was found for the container.

Who is it for

This product suits an adult who wants a moderate, clearly stated 250 mg supplemental magnesium dose with vitamin D3 in capsules, rather than a powder or gummy. It is a practical fit for someone who prefers vegetarian capsules and wants magnesium forms identified as glycinate and malate. The 60-day bottle also suits a routine once-daily use pattern. It is most appropriate when total vitamin D and magnesium intake from other supplements has already been checked.

Who is it not for

It is not a routine self-care choice for people with kidney impairment or anyone advised to limit magnesium, because reduced kidney clearance can raise toxicity risk. People using oral bisphosphonates, tetracycline or quinolone antibiotics need clinician or pharmacist guidance on timing, since magnesium can impair drug absorption. It also is not designed for children. People with high vitamin D intake, hypercalcemia, kidney stones, or a prescribed vitamin D plan should avoid casually stacking its 20 mcg dose.

Integrity

The product discloses a simple capsule format, 250 mg elemental magnesium, 20 mcg vitamin D3, four small vegetable ingredients, plant cellulose capsules, and rice hull extract. Its manufacturer states that it is vegetarian, non-GMO, gluten-free, and made in a U.S. cGMP facility. Those manufacturing and dietary claims are manufacturer statements, not a substitute for a current public certificate of analysis. Labdoor publicly lists historical certification for this finished product and describes a process involving retail purchase, ingredient testing, and contaminant screening. However, its current magnesium ranking marks the FarmHaven listing expired, and a current lot-matched report was not available. Searches did not identify a matching FDA recall or warning letter for FarmHaven or the disclosed seller, Anza Nutraceuticals. Packaging environmental details were not disclosed, including bottle resin, recycled content, refill availability, or recycling instructions.

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#5

Magnesium Glycinate with Quercetin 400mg

Buyer Score 87/100Integrity Score 72/100Sandhu's

Overview

This is a 120-capsule magnesium glycinate and quercetin supplement. The labeled serving is one capsule daily with food. Each capsule provides 72 mg elemental magnesium from 400 mg magnesium glycinate and 50 mg quercetin dihydrate from Japanese sophora flower-bud extract. It is therefore a 120-day supply when used as directed. The most important clarification is that the prominent 400 mg figure is the magnesium glycinate compound weight, not 400 mg elemental magnesium. The independently published NIH adult upper limit for magnesium from supplements and medicines is 350 mg daily, so the labeled 72 mg dose is well below it. Sandhu's own label fully lists vegetable-cellulose capsule, microcrystalline cellulose, and rice-hull extract. The company also states third-party testing, but no current lot-matched test report was publicly accessible.

What works

• The label clearly distinguishes 72 mg elemental magnesium from 400 mg magnesium glycinate.
• The labeled magnesium dose is well below the 350 mg adult upper limit for supplemental magnesium.
• Inactive ingredients and the vegetarian capsule are specifically disclosed.
• The manufacturing facility is currently listed by NSF as certified to NSF/ANSI 455-2 dietary-supplement GMP requirements.

What does not

• The 400 mg front-label wording can still be mistaken for elemental magnesium despite the clearer Supplement Facts panel.
• The product directions do not give usable spacing instructions for bisphosphonates, tetracycline antibiotics, or quinolone antibiotics, and do not flag kidney impairment.
• Sandhu's statement that there are no known medication interactions is too broad for a product containing magnesium and quercetin.
• Third-party testing is manufacturer-stated, but no public lot-specific certificate of analysis or exact-product independent certification listing was found.
• Human evidence for magnesium as a sleep aid remains limited, and the 72 mg elemental dose is lower than many researched supplemental doses.

Who is it for

This product fits an adult seeking a modest, clearly quantified magnesium add-on rather than a high-dose magnesium regimen. Its one-capsule daily direction and 120 servings suit someone who values a long supply and wants the elemental amount stated plainly. It may also suit people avoiding gelatin, since the capsule is vegetable cellulose, and those who prefer a formula without listed dairy, soy, or gluten. The added 50 mg quercetin means it is better suited to someone who has reviewed their medicines and does not want magnesium alone.

Who is it not for

It is not a good fit for people with kidney impairment or kidney failure unless their clinician specifically approves magnesium use, because reduced magnesium clearance raises toxicity risk. People taking oral bisphosphonates, tetracycline antibiotics, or quinolone antibiotics need a product with clear timing directions or individualized advice. Those using prescription medicines with narrow dosing margins should also be cautious because quercetin has interaction potential. It is not designed for children, and anyone seeking 400 mg elemental magnesium should not interpret this product as providing that amount.

Integrity

The product's strongest health transparency is its Supplement Facts panel. It identifies 72 mg elemental magnesium from 400 mg magnesium glycinate, plus 50 mg quercetin, and it lists the capsule and excipients. The magnesium amount sits below the U.S. adult upper limit for magnesium from supplements and medicines. However, magnesium can reduce absorption of certain antibiotics and oral bisphosphonates, and kidney impairment raises magnesium-toxicity risk. Those cautions are not adequately translated into the product directions. Sandhu Products Inc.'s Livermore, California manufacturing facility is listed by NSF as meeting NSF/ANSI 455-2 GMP requirements. This verifies the facility certification, not independent certification of this exact finished product. The company states that batches are third-party tested, but does not provide a public lot-matched report showing identity, heavy metals, microbiology, or undeclared-substance results. The bottle material, recycled content, refill availability, and local recycling directions were not specified, so its packaging impact cannot be meaningfully assessed.

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#6

Magnesium Breakthrough 4.0 Supplement by BiOptimizers

Buyer Score 84/100Integrity Score 68/100BIOptimizers

Overview

This is a vegan magnesium capsule supplement sold in a 30-capsule format. The listed use is two capsules daily with an evening meal, making this unit a 15-day supply. An independently displayed Supplement Facts panel identifies 500 mg elemental magnesium per two-capsule serving, plus 2 mg vitamin B6, 1 mg manganese, and 10 mg humic and fulvic blend. The magnesium comes from a proprietary 1,701 mg blend of chelate, bisglycinate, sucrosomial magnesium made from magnesium oxide, malate, orotate, taurate, and citrate. The total elemental dose is clear, but the amount supplied by each form is not. The manufacturer positions it for sleep, calm, stress response, cognition, muscle recovery, and broader wellness, while human sleep evidence for magnesium supplements remains mixed and uncertain overall.

What works

• The elemental magnesium dose, serving size, B6, manganese, and humic and fulvic blend are disclosed on an independently displayed label.
• Vitamin B6 at 2 mg and manganese at 1 mg are modest additions, rather than high-dose nutrient stacking.
• The inactive ingredients are named, including a hypromellose capsule, microcrystalline cellulose, ascorbyl palmitate, and coconut-derived MCT powder.
• The manufacturer gives a general medication and medical-condition caution, and specifically advises medical guidance for kidney problems on its product page.

What does not

• A two-capsule serving supplies 500 mg supplemental magnesium, above the U.S. adult upper limit of 350 mg per day from supplements and medicines without clinician guidance.
• The manufacturer also describes dose escalation far above the labeled serving, including up to 5,000 mg daily, which is not a dose-safe general-use message.
• The listed forms are inside a proprietary blend, so buyers cannot tell how much citrate, oxide-derived sucrosomial magnesium, glycinate, or any other individual form they receive.
• The cautions do not give practical timing instructions for medicines whose absorption magnesium can reduce, including certain antibiotics and oral bisphosphonates.
• No current public lot-matched certificate of analysis or active public finished-product certification registry entry was located. A Canadian Type III product-quality recall in January 2026 affected one lot because of capsule residue.

Who is it for

This product may fit an adult who has discussed magnesium use with a clinician, wants a capsule rather than a powder or gummy, and prefers a formula with a clearly stated 500 mg elemental-magnesium serving. It can also suit someone avoiding gelatin who values manufacturer-stated vegan, gluten-free, and soy-free positioning. The two-capsule evening routine is straightforward, but this 30-capsule unit provides only 15 daily servings, so it is better suited to a short trial or travel use than a month-long routine.

Who is it not for

It is not a casual high-dose magnesium choice for adults who have not considered total magnesium from supplements, antacids, or laxatives. People with kidney impairment, reduced kidney function, chronic diarrhea, or a history of magnesium-related gastrointestinal effects need clinician guidance. People using tetracycline or quinolone antibiotics, or oral bisphosphonates, need specific dose-separation advice that the product directions do not provide. It is also unsuitable for children at the labeled two-capsule dose, and pregnancy or nursing use should be cleared with a clinician.

Integrity

The formula uses a plant-based hypromellose capsule and discloses its principal inactive ingredients. It contains no sweeteners or sugar alcohols, which avoids the extra dental and digestive considerations common with gummies. Magnesium itself can cause diarrhea, nausea, and abdominal cramping at high supplemental intakes. Here, the labeled 500 mg daily dose exceeds the U.S. supplemental upper limit for adults, although the manufacturer acknowledges digestive effects and advises reducing the dose if they occur. The manufacturer claims U.S. production, GMP certification, and extensive internal testing, but a current public lot-specific finished-product report was not available for review. ConsumerLab selected this product for magnesium testing, though the public page does not disclose this product's result. Health Canada posted a January 19, 2026 Type III recall for Canadian lot 2504909 after residue was found on some capsules. No specific recycled-content, refill, material-resin, or locally usable recycling guidance was located for the bottle.

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#7

BIOptimizers Magnesium Breakthrough Drink - Raspberry Lemon

Buyer Score 82/100Integrity Score 69/100BIOptimizers

Overview

This is a raspberry lemonade magnesium powder intended to be mixed as one scoop with 6 ounces of water daily. An independent retailer label for the matching product identifies 30 servings, a roughly 5.8 g scoop, and 325 mg of elemental magnesium per serving. That is below the U.S. adult upper limit of 350 mg per day for supplemental magnesium, but it is close to it and is far above the limits for younger children. The label lists magnesium as a proprietary blend from chelate, bisglycinate, sucrosomial magnesium from oxide, malate, taurate, orotate, and citrate. That is seven named sources, despite current brand marketing describing eight forms. The source-by-source magnesium amounts are not disclosed. The formula also contains less than 1 g added sugar per serving and flavoring ingredients including raspberry and lemon powders, MCTs, gum acacia, silica, and thaumatin.

What works

• The elemental magnesium dose, 325 mg per scoop, is clearly stated on an independently listed Supplement Facts panel.
• One labeled adult serving remains below the 350 mg U.S. upper limit for supplemental magnesium.
• The label provides a usable daily mixing direction and a detailed inactive-ingredient list.
• The exact product listing identifies a vegetarian, gluten-free, stevia-free flavored powder.

What does not

• The 325 mg dose is close to the adult supplemental upper limit and is not suitable as a routine full serving for young children.
• The warning is generic. It does not specifically address kidney impairment or give the needed spacing directions for bisphosphonates, tetracycline antibiotics, and quinolone antibiotics.
• The named magnesium-source amounts are hidden inside a proprietary blend, and the label names seven sources while marketing says eight.
• No current public, lot-matched finished-product certificate of analysis or active independent certification entry was found for this drink.
• Sleep, stress, muscle, heart, immune, and recovery marketing extends beyond the limited human evidence available for magnesium at this exact formula and dose.

Who is it for

This product fits an adult who specifically wants a flavored, drink-mix format rather than capsules and wants a clearly labeled 325 mg supplemental magnesium serving. It may suit someone who prefers a stevia-free formula and can tolerate mildly acidic drink powders with MCTs and fruit-derived flavor ingredients. It is most appropriate when the person has reviewed all other magnesium-containing supplements, antacids, and laxatives they use, since the serving is already near the adult supplemental upper limit.

Who is it not for

It is not a routine choice for children, particularly those under 9, because one serving exceeds their supplemental magnesium upper limits. People with kidney disease, reduced kidney function, persistent diarrhea, or a history of magnesium-related gastrointestinal effects should use clinician guidance. It also needs careful timing or professional advice for people taking oral bisphosphonates, tetracycline antibiotics, or quinolone antibiotics, because magnesium can reduce absorption. Those seeking a product with public lot-specific contaminant testing or current finished-product certification should choose a product documented in a public registry.

Integrity

The product has a disclosed powdered format and ingredient list, including less than 1 g added sugar per serving. The matching retailer label describes it as vegetarian and gluten-free, and the manufacturer says newer drink formulas are stevia-free. Magnesium can cause diarrhea, nausea, and abdominal cramping at higher supplemental intakes. This 325 mg serving is just under the adult supplemental upper limit, so stacking it with magnesium-containing medicines or other supplements deserves attention. No public lot-specific certificate of analysis matched to this drink was located, and no current independent certification listing for the finished drink was found. An Informed Sport record existed for a capsule product, but that certification was withdrawn on August 10, 2025 and does not verify this powder. A January 2026 Canadian Type III recall involved residue on one lot of the brand's capsules, not this drink. No container material, recycled-content claim, refill option, or locally usable recycling instruction was substantiated.

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#8

Vitamin D3 K2 Supplement with Minerals

Buyer Score 80/100Integrity Score 68/100Sandhu's

Overview

This is a 120-capsule adult formula intended for one capsule daily with food. The manufacturer states that each capsule provides vitamin D3 at 5,000 IU, vitamin K2 as MK-7 at 120 mcg, magnesium at 25 mg, vitamin B6, zinc, and quercetin. A 120-capsule bottle is therefore a four-month supply when used as directed. The listed 25 mg magnesium is a modest elemental dose, well below the U.S. adult supplemental magnesium upper limit of 350 mg. The more consequential dose is vitamin D3 at 5,000 IU daily, which exceeds the National Academies adult upper limit of 4,000 IU unless a clinician has advised otherwise. The manufacturer lists vegetable cellulose, MCT powder, microcrystalline cellulose, and magnesium stearate as other ingredients, and states that the capsules are gluten-free and dairy-free.

What works

• The 25 mg elemental magnesium dose is plainly stated and remains well below the U.S. supplemental magnesium upper limit.
• One capsule per day gives a manufacturer-stated 120-day supply, which keeps the routine simple.
• The product discloses its principal inactive ingredients, including a vegetable capsule and MCT powder.
• Sandhu Products Inc.'s Livermore manufacturing facility is listed by NSF as certified to NSF/ANSI 455-2 dietary-supplement GMP requirements.

What does not

• The daily 5,000 IU vitamin D3 dose exceeds the National Academies adult upper limit of 4,000 IU, so it is not a casual long-term default dose for every adult.
• The directions do not give practical spacing instructions for oral bisphosphonates, tetracycline antibiotics, or quinolone antibiotics, despite magnesium and zinc interactions with these medicines.
• The manufacturer claims third-party testing, but no current lot-specific finished-product certificate showing identity, heavy metals, microbes, or adulterant testing was publicly available.
• No public registry entry was located for independent certification or blind testing of this exact finished product. The NSF listing applies to the facility, not this product.
• Claims about preventing calcium buildup in arteries, superior absorption, mood, mental clarity, and sustained energy go beyond what this formula and its disclosed doses establish.

Who is it for

This product fits an adult who has been specifically advised to use a higher vitamin D dose, wants vitamin K2 included, and prefers a one-capsule routine rather than several separate products. It may also suit someone who needs only a small amount of supplemental magnesium, since the listed 25 mg is far below a typical standalone magnesium dose and below the supplemental upper limit. The four-month bottle is practical for a consistent clinician-guided plan. It is not a substitute for measuring and treating vitamin D deficiency under medical care.

Who is it not for

It is not suited to adults who are already taking vitamin D from a multivitamin, calcium product, or other high-dose supplement without first totaling their intake. Avoid self-starting it during pregnancy or breastfeeding, with kidney disease, hypercalcemia, kidney-stone risk, sarcoidosis, or other disorders that can alter vitamin D handling, unless a clinician directs use. People using warfarin or related anticoagulants should seek medical advice because of vitamin K2. Those taking oral bisphosphonates, tetracycline antibiotics, or quinolone antibiotics need individualized dose timing that the directions do not provide.

Integrity

A meaningful accountability point is independently verifiable. Sandhu Products Inc.'s Livermore facility appears in NSF's current NSF/ANSI 455-2 GMP listing for dietary supplements, including capsule manufacturing and packaging operations. That supports facility-level quality systems, but it does not certify the contents or contaminant status of this individual product. The manufacturer states that the product is third-party tested, yet no bottle-lot-matched certificate of analysis was publicly accessible for review. The formula contains 5,000 IU vitamin D3 per daily capsule, above the National Academies adult upper limit of 4,000 IU. The label also lists MCT powder, which is coconut-derived, and a retailer flags coconut with possible tree-nut exposure. No product-specific FDA recall, warning letter, or exposure alert was found in the public databases searched. Packaging is a conventional supplement bottle, with no verified recycled-content percentage, refill program, resin identification, or locally usable recycling instructions disclosed.

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#9

Moon Juice Magnesi-Om Berry Flavor Supplement

Buyer Score 79/100Integrity Score 73/100Moon Juice

Overview

This is a berry-flavored, zero-sugar powder for adults, taken as 1 teaspoon mixed into water, usually at night. The jar provides 30 servings. Each serving lists 310 mg elemental magnesium from citrate, gluconate, and acetyl taurinate, plus 112 mg L-theanine. Those amounts and the ingredient list are corroborated by a major US retailer and Moon Juice’s product page. The magnesium dose is below the US adult upper limit of 350 mg per day from supplements and medicines, but it leaves little room for other magnesium products. Moon Juice claims third-party finished-product testing and traceable inputs, but does not publish a lot-matched certificate of analysis or a public independent certification listing. Evidence for calm and sleep is suggestive rather than product-specific, especially because the L-theanine dose is below the 200 to 400 mg range commonly studied for stress.

What works

• The elemental magnesium amount is plainly stated as 310 mg per teaspoon, rather than only listing compound weights.
• One standard serving remains below the US adult supplemental magnesium upper limit of 350 mg.
• The formula has a short disclosed ingredient list, with no sugar, gelatin, or sugar alcohols.
• The berry version identifies a tree-nut shared-facility warning, which is more useful than omitting cross-contact context.
• Moon Juice offers a refill format for the product, and the standard jar is glass, according to the manufacturer.

What does not

• Moon Juice describes daily use as safe using total-intake recommendations, but the relevant US upper limit for supplemental magnesium is 350 mg. A second magnesium product or laxative could push total supplemental intake above that limit.
• The available warnings cover pregnancy and children, but do not give practical timing directions for tetracycline or quinolone antibiotics, oral bisphosphonates, or guidance for kidney impairment.
• Magnesium citrate and gluconate can cause diarrhea, nausea, or cramps. The product also promotes regularity, so looser stools are a foreseeable effect rather than an unexpected reaction.
• The 112 mg L-theanine dose is fully disclosed, but is lower than the 200 to 400 mg daily range highlighted in human stress research.
• Third-party testing is manufacturer-stated only. No public, lot-specific certificate or finished-product certification registry entry was located.

Who is it for

This product suits an adult who wants a flavored nightly magnesium drink, prefers powder to capsules, and is not already using another magnesium supplement or magnesium-containing laxative. The 30-serving jar and one-teaspoon routine are straightforward for someone seeking a modest relaxation ritual or occasional help with regularity. It also fits buyers avoiding sugar, gelatin, and sugar alcohols. It is most appropriate for people with normal kidney function who can review their full supplement and medicine schedule before adding 310 mg daily.

Who is it not for

It is not well suited to people with kidney impairment or kidney failure, because reduced magnesium clearance raises toxicity risk. People taking doxycycline, ciprofloxacin, levofloxacin, alendronate, or similar medicines need clinician or pharmacist guidance on dose separation, which the available product warning does not provide. Avoid using it casually alongside magnesium antacids, laxatives, or other magnesium supplements. People prone to diarrhea, abdominal cramping, or urgent bowel movements may find the citrate-containing formula poorly tolerated. Pregnancy or breastfeeding also warrants professional advice.

Integrity

The formula identifies 310 mg elemental magnesium, the three magnesium sources, 112 mg L-theanine, and the berry excipients. It has no added sugar and uses monk fruit for sweetness. The label information includes a tree-nut shared-facility notice and a pregnancy caution. However, clinically relevant kidney-risk and medicine-timing instructions are not apparent in the available directions. Magnesium supplements can interfere with oral bisphosphonates and certain antibiotics, and high supplemental intakes can cause gastrointestinal effects. Moon Juice states that raw ingredients and the finished product undergo third-party testing for identity, microbes, heavy metals, and contaminants. That is not equivalent to public proof, because no lot-matched test report or recognized finished-product certification listing was found. For packaging, Moon Juice states that jars are reusable glass and sells refills. Its sustainability page describes compostable refill pouches and FSC-certified outer cartons, but local composting and recycling acceptance still varies.

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#10

SonoHealth Magnesium Complex Spectrum 5

Buyer Score 76/100Integrity Score 59/100SonoHealth

Overview

Spectrum 5 Magnesium is a 60-capsule dietary supplement intended for adults. SonoHealth describes a serving as two capsules, taken daily with food, for 30 servings per bottle. The company states that the serving supplies 500 mg magnesium and 72 marine trace minerals, and markets it for sleep, stress, muscle recovery, and energy support. The defining issue is label consistency. SonoHealth's product page presents a 500 mg magnesium blend containing glycinate, malate, citrate, taurate, and L-threonate, while its product facts and other pages identify glycinate, malate, citrate, oxide, and hydroxide. Its published inactive-ingredient descriptions also differ. The stated 500 mg daily amount exceeds the U.S. upper limit of 350 mg per day for magnesium from supplements and medicines, so gastrointestinal effects and medical context matter.

What works

• The manufacturer gives a concrete adult serving size, daily directions, and a split-dose option.
• SonoHealth identifies a vegetable cellulose capsule, which the company states is vegan.
• The manufacturer tells people with kidney disease, people who are pregnant or nursing, and people taking medicines to seek professional guidance.
• SonoHealth states that each batch is third-party tested and that a certificate of analysis is available on request.

What does not

• The stated 500 mg supplemental magnesium serving is above the U.S. adult upper limit of 350 mg per day, a level set to limit diarrhea and related gastrointestinal effects.
• Published manufacturer pages conflict about which five magnesium forms are present, including whether oxide and hydroxide or taurate and L-threonate are used.
• The claimed 72 trace minerals are not individually identified or quantitatively disclosed in the published product information reviewed.
• The third-party testing and GMP claims are manufacturer-stated. No public lot-matched test report or finished-product certification registry entry was located.
• Sleep, calm, energy, and enhanced-absorption marketing goes beyond the limited direct evidence for this exact multi-ingredient formula.

Who is it for

This product is most relevant to an adult who has been advised by a clinician to use a relatively high supplemental magnesium intake, wants capsules rather than powders or gummies, and can monitor for loose stools, nausea, or cramping. The two-capsule serving can be split between morning and evening, which may help people who prefer not to take both capsules at once. Vegan users and people avoiding gluten or soy may also value the manufacturer's stated dietary attributes. Formula inconsistencies make clinician guidance especially useful.

Who is it not for

It is not appropriate for children without medical direction. People with kidney impairment or kidney failure should not self-start this product because reduced magnesium clearance raises toxicity risk. People taking oral bisphosphonates, tetracycline antibiotics, or quinolone antibiotics need individualized timing advice, because magnesium can reduce medicine absorption. It also warrants caution for people prone to diarrhea, nausea, or abdominal cramping, since the stated supplement dose exceeds the adult upper limit. Those needing a fully stable, transparent ingredient list should choose a product with one consistent current label and public batch results.

Integrity

The health issue that stands out is dose. SonoHealth states that two capsules provide 500 mg magnesium per day. NIH guidance places the adult upper limit for magnesium from supplements and medicines at 350 mg daily, largely because higher supplemental intakes can cause diarrhea, nausea, and abdominal cramping. The company does include general kidney disease and medication cautions, but its antibiotic timing guidance is less specific than NIH guidance for tetracycline and quinolone antibiotics. SonoHealth states that the product is made in the USA in a GMP-certified facility, is batch tested by a third party, and has a certificate of analysis available on request. Those are accountability claims, not public lot-specific proof. No public finished-product certification listing or lot-matched report was located. Packaging material, recycled content, refill availability, and locally usable recycling directions were not specified in the product information reviewed.

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