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 190 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Muscle Maker Chocolate ShakeGiant Sports92 mg
- Muscle Maker Vanilla ShakeGiant Sports23 mg
- Muscle Martini Mixed Berry CandyGAT52 mg
- Muscle Mass Gainer ChocolateLabradain a blend
- Muscle Matrix MRP Banana CreamNutraBio12 mg
- Muscle Matrix MRP Chocolate MilkshakeNutraBio · off the market12 mg
- Muscle Matrix MRP Creamy VanillaNutraBio · off the market12 mg
- Muscle Matrix MRP Strawberry SmoothieNutraBio12 mg
- Muscle Matrix MRP Women's Formula Banana CreamNutraBio8 mg
- Muscle Matrix MRP Women's Formula Chocolate MilkshakeNutraBio8 mg
- Muscle Matrix MRP Women's Formula Creamy VanillaNutraBio8 mg
- Muscle Matrix MRP Women's Formula Strawberry SmoothieNutraBio8 mg
- Muscle Matrix Protein Alpine VanillaNutraBio13 mg
- Muscle Matrix Protein BananaNutraBio12 mg
- Muscle Matrix Protein Blend Freedom FettiNutraBio · off the market13 mg
- Muscle Matrix Protein Chocolate Peanut ButterNutraBio13 mg
- Muscle Matrix Protein Chocolate Peanut Butter BlissNutraBio13 mg
- Muscle Matrix Protein Confetti CakeNutraBio · off the market13 mg
- Muscle Matrix Protein Cookies & CreamNutraBio13 mg
- Muscle Matrix Protein Dutch ChocolateNutraBio15 mg
- Muscle Matrix Protein Ice Cream Cookie DreamNutraBio13 mg
- Muscle Matrix Protein Strawberry PastryNutraBio13 mg
- Muscle Matrix Protein Wild StrawberryNutraBio12 mg
- Muscle Matrix Protein Women's Formula Alpine VanillaNutraBio9 mg
- Muscle Matrix Protein Women's Formula Dutch ChocolateNutraBio9 mg
- Muscle Milk Banana Creme ShakeChampBev132 mg
- Muscle Milk Brownie BatterCytoSport140 mg
- Muscle Milk ChocolateCytoSport140 mg
- Muscle Milk Chocolate Milk ShakeChampBev163 mg
- Muscle Milk Collegiate Chocolate Milk ShakeCytoSport100 mg
- Muscle Milk Collegiate Vanilla Creme ShakeCytoSport80 mg
- Muscle Milk Cookies 'N' Creme ShakeChampBev87 mg
- Muscle Milk Genuine ChocolateMuscle Milkin a blend
- Muscle Milk Genuine Vanilla CremeMuscle Milkin a blend
- Muscle Milk Light Banana CremeCytoSport140 mg
- Muscle Milk Light Cake BatterCytoSport140 mg
- Muscle Milk Light Chocolate MilkCytoSport140 mg
- Muscle Milk Light Peanut Butter ChocolateCytoSport140 mg
- Muscle Milk Light Vanilla CremeCytoSport140 mg
- Muscle Milk Orange CremeCytoSportin a blend
- Muscle Milk Pro Series Intense VanillaMuscle Milkin a blend
- Muscle Milk Pro Series Knockout ChocolateMuscle Milk168 mg
- Muscle Milk Strawberry BananaCytoSportin a blend
- Muscle Milk Vanilla Creme ShakeChampBev87 mg
- Muscle Optimeal Chocolate FlavorJarrow Formulas · off the market120 mg
- Muscle Optimeal Vanilla CremeJarrow Formulas · off the market120 mg
- Muscle RecoveryVitamer Laboratories15 mg
- Muscle RecoverySignature Supplements150 mg
- Muscle Recovery & Joint SupportGNC GenetixHD · off the market60 mg
- Muscle Relax with Calcium LactateTerry Naturally50 mg