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 110 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Grass Fed Whey Protein Isolate Matcha LatteNutraBio35 mg
- Grass-fed Collagen Plus Natural FlavorBiochem8 mg
- Grass-Fed Pure Whey Protein Chocolate Milkshake FlavorPrimeGENIX21 mg
- Grass-Fed Whey Protein ChocolateEat The Bear ETB · off the marketin a blend
- Grass-Fed Whey Protein Concentrate 25 g Milk ChocolateNutricost30 mg
- Grass-Fed Whey Protein IsolateBulkSupplements.com24 mg
- Grass-Fed Whey Protein Isolate 30 g UnflavoredNutricost25 mg
- Grass-Fed Whey Protein Isolate UnflavoredFortifeye17 mg
- Grass-Fed Whey Protein StrawberryAN Amazing Nutrition Amazing Formulasin a blend
- Grass-Fed Whey Protein VanillaEat The Bear ETB · off the marketin a blend
- Grass-Fed, Certified rBGH-Free Whey Protein Powder ChocolateSwanson Ultra · off the market25 mg
- Grass-Fed, Certified rBGH-Free Whey Protein Powder StrawberrySwanson Ultra · off the market15 mg
- Grass-Fed, Certified rBGH-Free Whey Protein Powder VanillaSwanson Ultra · off the market12 mg
- Great Results KetoJustified Laboratories150 mg
- Green and RedNatures Plus Source of Life · off the market100 mg
- Green and RedNaturesPlus Source of Life100 mg
- Green and Red Mini-TabsNature's Plus Source of Life · off the market100 mg
- Green Barley Grass 500 mgGood 'N Natural · off the market38 mg
- Green BulgeControlled Labs40 mg
- Green Clean Herbal Cleanse Honey Tea FlavorDetoxify8 mg
- Green Complete Superfood Powder Natural Vanilla Bean FlavorNutrex Hawaii · off the market20 mg
- Green Fast KetoJustified Laboratoriesin a blend
- Green Fast Keto MaxJustified Laboratoriesin a blend
- Green MagmaGreen Foods · off the market12 mg
- Green Magma Barely Grass JuiceGreen Foods · off the market6 mg
- Green Magma TabletsGreen Foods6 mg
- Green MAGnitude Sour Green AppleControlled Labs40 mg
- Green PowerGreens Today220 mg
- Green Power FormulaGreens Today · off the market227 mg
- Green SourceRadiance125 mg
- Green SourceGood 'N Natural · off the market25 mg
- Green SourceWonder Laboratories25 mg
- Green SourceDC125 mg
- Green SourcePuritan's Pride25 mg
- Green Source Iron FreePuritan's Pride25 mg
- Green Source Multi Vitamins & MineralsVitamin World125 mg
- Green Source Multivitamin & MineralsVitamin World125 mg
- Green Superfood Hydrate Strawberry Lemonade FlavorAmazing Grass40 mg
- Green Superfood Multivitamin Pineapple LemongrassAmazing Grass200 mg
- Green SuperFood Pineapple Lemongrass FlavorAmazing Grass · off the market200 mg
- Green Tea EGCG & CranberryProCaps Laboratories · off the market50 mg
- Green Tea EGCG and CranberryProCaps Laboratories50 mg
- Green VibranceVibrant Health25 mg
- Green Vibrance + 25 Billion ProbioticsVibrant Health · off the market27 mg
- Green Vibrance Cocoa Matcha LatteVibrant Health37 mg
- Green Vibrance+Vibrant Health25 mg
- GreensCatie's · off the market20 mg
- GreensBarlean's Organic Oils · off the market12 mg
- GreensBarlean's · off the market12 mg
- GreensGT Genesis Today31 mg