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 111 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Greens & Fruits ChocolateNutrology25 mg
- Greens + Reds Natural OrangeSwolverine21 mg
- Greens BerryIt Works!50 mg
- Greens Blend SweetgreensHealthy Skoop5 mg
- Greens Blend VanillaHealthy Skoop5 mg
- Greens Chocolate SilkBarlean's Organic Oils · off the market15 mg
- Greens CompleteAkasha Naturals19 mg
- Greens Effervescent Tablets Melon Lime FlavorTrace Minerals40 mg
- Greens Natural Berry FlavorBarlean's12 mg
- Greens on the Go BerryIt Works!50 mg
- Greens+ Apple BananaAxe & Sledge Supplements13 mg
- Grey Defence GeneJOLT!COORGA Nutraceuticals · off the market30 mg
- Ground FlaxseedBareOrganics21.7 mg
- Ground Flaxseed with Mixed BerriesSpectrum Essentials43 mg
- GroundedPacific BioLogic169 mg
- Grow Bone CalciumGarden of Life Vitamin Code386 mg
- GROW Chocolate Peanut Butter CupCore Nutritionals50 mg
- GROW Cookies N' CreamCore Nutritionals50 mg
- GROW Vanilla MilkshakeCore Nutritionals30 mg
- Growing Bones Natural Strawberry Flavour ChewablesHigher Nature Kids60 mg
- Growing Bones Natural Strawberry Flavour ChewablesHigher Nature for Kids60 mg
- GSF ComplexGenestra Brands25 mg
- Gt ThymusSystemic Formulas Bio Function24 mg
- Gtc #2Bronson · off the market25 mg
- GTC FormulaBronson50 mg
- GTC Formula #2Bronson Laboratories · off the market25 mg
- GTF ChromiumMetabolic Maintenance40 mg
- Guggal Extra StrengthR-U-Ved50 mg as transcribed, likely a slip
- Guggal-LipAyush Herbs50 mg as transcribed, likely a slip
- Guggul Extra StrengthR-U-Ved50 mg as transcribed, likely a slip
- GummiesNatures Plus Source of Life Animal Parade10 mg
- GummiesNaturesPlus Animal Parade10 mg
- Gummies Calcium & Magnesium Raspberry FlavorGarden of Life Vitamin Code99 mg
- Gummies Multi Vitamin With MineralsTreehouse4 mg
- Gummies MultivitaminNatureSmart2 mg
- Gummy Bear EssentialsRainbow Light · off the market20 mg
- Gummy Power SoursRainbow Light · off the market20 mg
- Guna-BasicGUNA Biotherapeutics150 mg
- Gymnema & Alpha-Lipoic ComplexAFI America's Finest20 mg
- GynecrineProgressive Professional from Progressive Laboratories125 mg
- Gynovite PlusOptimox Corporation · off the market600 mg
- Gynovite PlusOptimox600 mg
- GynplexDNA Dynamic Nutritional Associates25 mg
- H Hydro Recovery Coconut FlavorBiochem7 mg
- H-BlockeriSatori236 mg
- H-Proof Black CherryH-Proof10 mg
- H.A. Joint & Skin Super FormulaPurity Products10 mg
- H.A. Joint FormulaPurity Products10 mg
- H.A. Joint SportPurity Products10 mg
- H2 EliteQuicksilver Scientific80 mg