mineral
Magnesium supplements
Half of the 14,003 magnesium supplements in the NIH label database that print an amount list 86 mg or less per serving; the middle half list 30 mg to 200 mg, and 15% of the 13,789 with a plausible amount give more than the adult upper limit at the most servings their labels direct (DSLD version 9.4.0, January 2026). The 823 products whose only supplement ingredient is magnesium list a median of 240 mg, and 45% of them give more than the upper limit.
- Products listing it
- 15,08814,003 print an amount; 715 list it inside a blend without an amount
- Median per serving
- 86 mgmiddle half 30 mg to 200 mg
- FDA Daily Value
- 420 mgthe median is 20% of it
- Adult upper limit (IOM)
- 350 mg2,019 products go above it a day
How much magnesium do supplements contain?
The median product lists 86 mg per serving. One in ten lists 12 mg or less, one in ten 320 mg or more. The amount printed most often is 100 mg (1,632 products).
Products by amount of magnesium per serving
14,359 products, log scale; extreme 0.2% at each end left out of the drawing.
Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).
How do the amounts compare with the Daily Value and the upper limit?
The FDA Daily Value for magnesium is 420 mg (adults and children 4 and older). The median product gives 20% of it per serving; the 90th percentile 76%.
The adult Tolerable Upper Intake Level is 350 mg a day (magnesium from supplements and medicines only (not food or water)). At the most servings their labels direct, 2,019 of the 13,789 products with a plausible amount (14.6%) give more than that from the supplement alone (what counts as plausible).
The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.
Sources: 21 CFR 101.9(c)(8)(iv) (Daily Values); Institute of Medicine, DRI summary tables (2011) (upper limits); on reading them, the FDA's Daily Value page.
Which forms of magnesium do labels name?
Magnesium oxide is the form named most often: 5,110 of the 15,088 magnesium products (34%), ahead of magnesium citrate (2,739, 18%) and magnesium glycinate (1,307, 9%). A product naming two forms counts in both; the table below gives every form.
Products by the form of magnesium on the label
Count, and the median amount per serving in that form.
| Form | Products | Share of magnesium products | Median per serving |
|---|---|---|---|
| Magnesium oxide | 5,110 | 34% | 100 mg |
| Magnesium citrate | 2,739 | 18% | 113 mg |
| Magnesium glycinate | 1,307 | 9% | 113 mg |
| Magnesium aspartate | 1,038 | 7% | 150 mg |
| Magnesium malate | 903 | 6% | 100 mg |
| Magnesium carbonate | 401 | 3% | 100 mg |
| Magnesium gluconate | 254 | 2% | 100 mg |
| Magnesium hydroxide | 211 | 1% | 60 mg |
| Magnesium taurate | 139 | under 1% | 300 mg |
| Magnesium chloride | 95 | under 1% | 75 mg |
| Magnesium L-threonate | 72 | under 1% | 144 mg |
| Magnesium lactate | 55 | under 1% | 55 mg |
| Magnesium orotate | 37 | under 1% | 71.5 mg |
Source: the form each label gives for its magnesium row (DSLD "forms"), current labels.
Which products list the most magnesium?
On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).
- Part III: Mineral Digestive SweepNature's Way1,100 mg
- Oxygen CleanseThe Vitamin Shoppe1,035 mg
- Mag O7Pure Vegan1,035 mg
- MagO7Aerobic Life1,035 mg
- Mag O7Aerobic Life1,035 mg
- Mag O7 PowderAerobic Life1,035 mg
- Mag O7NB Pure Pure Vegan1,035 mg
- MagO7NB Pure Pure Vegan1,035 mg
Have the amounts changed over the years?
Products whose current label entered DSLD in 2011 list a median of 66 mg; those entered in 2025, 100 mg.
| Year | Products | Median per serving |
|---|---|---|
| 2011 | 314 | 66 mg |
| 2012 | 880 | 100 mg |
| 2013 | 1,103 | 80 mg |
| 2014 | 714 | 85 mg |
| 2015 | 729 | 60 mg |
| 2016 | 667 | 63 mg |
| 2017 | 691 | 100 mg |
| 2018 | 608 | 62 mg |
| 2019 | 681 | 100 mg |
| 2020 | 1,283 | 100 mg |
| 2021 | 1,210 | 75 mg |
| 2022 | 1,325 | 100 mg |
| 2023 | 1,267 | 100 mg |
| 2024 | 1,479 | 100 mg |
| 2025 | 1,408 | 100 mg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing magnesium by DSLD product type
Brands listing it most: Douglas Laboratories (301), Nature's Plus (215), Nature's Way (181), NutraBio (170), Bluebonnet (119), NOW (116), Country Life (111), Trace Minerals Research (103), Pure Encapsulations (95), Bronson (94).
Every product listing magnesium
15,088 products, A to Z by name (page 60 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Century AdultSmart Sense50 mg
- Century AdultsSignature Care50 mg
- Century CompleteTop Care50 mg
- Century Complete Multivitamin/Multimineral SupplementEqualine50 mg
- Century FormulaSwanson Premium Brand · off the market100 mg
- Century Formula Without IronSwanson Premium Brand · off the market100 mg
- Century MatureSmart Sense50 mg
- Century MatureGoodSense50 mg
- Century MatureSignature Care50 mg
- Century MatureMeijer50 mg
- Century menSignature Care100 mg
- Century Men'sEqualine100 mg
- Century Senior 50+ FormulaSafeway Care50 mg
- Century Senior Ultimate Men'sTop Care50 mg
- Century Ultimate Men'sTop Care100 mg
- Century Ultimate Men's Senior FormulaSafeway Care50 mg
- Century Ultimate Women'sTop Care100 mg
- Century WomenGoodSense100 mg
- Century Women's Complete 50+TopCare Health100 mg
- CephalgesicEcological Formulas60 mg
- Ceracarenutra4health · off the market125 mg
- Cerebral CalmEmerald Labs125 mg
- CereMag Mixed BerryOrtho Molecular Products200 mg
- CerenityOrtho Molecular Products75 mg
- Cerenity PMOrtho Molecular Products150 mg
- CereVenPremier Research Labs10 mg
- CereViveOrtho Molecular Products75 mg
- CereVive Jr. BerrySpringboard25 mg
- CeroviteRugby50 mg
- Cerovite Jr.Rugby40 mg
- Cerovite SeniorRugby50 mg
- CertaVite SeniorMajor50 mg
- CertaVite with AntioxidantsMajor50 mg
- Certified Organic SpirulinaSwanson GreenFoods Formulas · off the market6 mg
- Certified Organic Spirulina 1 gramSwanson · off the market6 mg
- Certified Organic Spirulina 500 mgSwanson6 mg
- CFS ComplexPriority One Nutritional Supplements90 mg
- CG5 UnflavoredPMD66 mg
- CGT Max Raw UnflavoredNutraBio65 mg
- CGT Max Tropical Fruit PunchNutraBio67 mg
- CGT Max V.3 UnflavoredNutraBio · off the market67 mg
- CGT Max V.4 Fruit PunchNutraBio · off the market67 mg
- CGT Max V.4 Lemon LimeNutraBio67 mg
- CH ControlMaxi Health500 mg
- Ch-Ch-Ch-Chia Omega-3 Chia SeedsJoseph Enterprisesin a blend
- Chain Gang BCAA Juicyfruit JellyfishChaotic Labz60 mg
- Chainsaw Blue BombApollon Nutrition14 mg
- Champion BlendIsotonix · off the market90 mg
- Chandraprabha Vati TabletVedic Supplementsin a blend
- Charge Blood OrangeRoyal Sport · off the market10 mg