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 269 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Total Amino SolutionGenesa9.3 mg
- Total ArginineNutri-West8 mg
- Total Balance Children'sXtendlife33 mg
- Total Balance Men'sXtendlife65 mg
- Total Balance Men's PremiumXtendlife67 mg
- Total Balance UnisexXtendlife · off the market65 mg
- Total Balance Unisex PremiumXtendlife66 mg
- Total Balance Women'sXtendlife65 mg
- Total Balance Women's PremiumXtendlife67 mg
- Total Body Detox With Lychee Berry JuiceLichi Super Fruit · off the market2 mg
- Total BrainNutri-West12 mg
- Total CalciumNutri-West50 mg
- Total Calm P.M. NootropicTerra ELMNT100 mg as transcribed, likely a slip
- Total CardioCover + MagnesiumDr. David Williams · off the market75 mg
- Total CardioCover MagnesiumWilliams Nutrition · off the market75 mg
- Total ChelateNutri-West25 mg
- Total Children's ChewableNutri-West10 mg
- Total Colon WellnessBio Nutrition50 mg
- Total ComfortProfessional Botanicals56 mg
- Total FemaleNutri-West20 mg
- Total Formula 3Integrative Therapeutics102 mg
- Total GreenNutri-West13 mg
- Total Health FormulaMicroTech Professional Formulations150 mg
- Total HeartNutri-West20 mg
- Total Keto Daily Salted Watermelon FlavorOnnit85 mg
- Total L-CarnitineNutri-West2 mg
- Total Lean MultivitaminGNC Total Lean125 mg
- Total Liver D-ToxNutri-West10 mg
- Total MaleNutri-West20 mg
- Total Mins Iron-free with Boron and Vitamin DCountry Life Target-Mins500 mg
- Total MitochondriaNutri-West11.25 mg
- Total MultimuneNutri-West20 mg
- Total Nutrition Liquid MultivitaminGenesis Today8 mg
- Total Nutrition Liquid MultivitaminGT Genesis Today8 mg
- Total One PrenatalAdvanced Nutrition by Zahler12.5 mg
- Total RestoreGundry MD7 mg
- Total Strength + Performance Strawberry LemonadeOnnit40 mg
- Total Systemic D-ToxNutri-West10 mg
- Total Systemic EnzymeNutraNomics · off the marketin a blend
- Total TrimNutri-West2.4 mg as transcribed, likely a slip
- Total Upper GINutri-West7.5 mg
- Total Vegan Drink Mix Natural Chocolate FlavorNikken Wellness Kenzenin a blend
- Total Well-BeingNOW20 mg
- Total-Cal Hydroxyapatite With Magnesium & Vitamin DPharmacist's Select600 mg
- Totally FeminineTransformations Weight Loss100 mg
- Totally ZenCarlson50 mg
- Toxic Relief BoosterThorne Research · off the market100 mg
- Trace Liquid Multivitamin Creatine Serum Lemon LimePhytonutritia20 mg
- Trace Liquid Multivitamin Creatine Serum RaspberryPhytonutritia20 mg
- Trace MinDouglas Laboratoriesin a blend