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.

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).

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.

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.

• Magnesium oxide
• Magnesium citrate
• Magnesium glycinate
• Magnesium aspartate
• Magnesium malate
• Magnesium carbonate
• Magnesium gluconate
• Magnesium hydroxide
• Magnesium taurate
• Magnesium chloride
• Magnesium L-threonate
• Magnesium lactate
• Magnesium orotate

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.

In which products and brands?

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 7 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Active Health TeenRainbow Light · off the market300 mg
• Active Health Teen MultivitaminRainbow Light · off the market300 mg
• Active Hydration Coconut Berry FlavorSunwarrior Sport100 mg
• Active Hydration Strawberry Lemon Twist FlavorSunwarrior Sport100 mg
• Active Kids CompleteOneSource · off the market10 mg
• Active Lemon + LimeNuun · off the market25 mg
• Active MagnesiumSeeking Health100 mg
• Active Magnesium ChewableSeeking Health · off the market100 mg
• Active ManMET-Rx100 mg
• Active Man's FormulaVitabase200 mg
• Active Men's Alpha-MultiVivid Health Nutrition100 mg
• Active Milk ChocolateGNC Women's Ultra Mega100 mg
• Active Mixed BerryGNC Ultra Mega Green25 mg
• Active MultiFINAFLEX150 mg
• Active Multi PacksMET-Rx100 mg
• Active Multi ViteGenestra Brands27.5 mg
• Active Multi Vite Without Vitamin AGenestra Brands27.5 mg
• Active One Multi with IronSwanson Premium Brand · off the market8 mg
• Active OrangeNuun25 mg
• Active Protein Vanilla FlavorSunwarrior Sport · off the market18 mg
• Active SeniorRainbow Light · off the market100 mg
• Active Senior SafeGuard MultivitaminRainbow Light · off the market100 mg
• Active Seniors UnflavoredAll One200 mg
• Active Strawberry LemonadeNuun · off the market25 mg
• Active Tri-BerryNuun · off the market25 mg
• Active TropicalNuun25 mg
• Active VanillaGNC Women's Ultra Mega50 mg
• Active Vanilla CremeGNC Women's Ultra Mega100 mg
• Active Vanilla FlavorReliv60 mg
• Active Vitamin PackKirkland Signature50 mg
• Active WatermelonNuun25 mg
• Active without IronGNC Women's Ultra Mega100 mg
• Active WomanMet-Rx100 mg
• Active Woman's MultiVitabase400 mg
• Active Women's MultivitaminSuper Nutrition400 mg
• Active-C 1000 mgThe Vitamin Shoppe20 mg
• Active-C 1000 mg with BioflavonoidsThe Vitamin Shoppe · off the market20 mg
• Active-C 500 mgThe Vitamin Shoppe10 mg
• Active-C 500 with Bioflavonoids 500 mgThe Vitamin Shoppe · off the market10 mg
• Active-C Plus 500 mgThe Vitamin Shoppe10 mg
• Active-C with Bioflavonoids 1000 mgThe Vitamin Shoppe20 mg
• Active-C with Bioflavonoids 500 mgThe Vitamin Shoppe10 mg
• ActiveEssentialsXYMOGEN · off the market50 mg
• ActiveMVdotFIT150 mg
• ActivEssentialsXYMOGEN · off the market50 mg
• ActivEssentials For WomenXYMOGEN · off the market50 mg
• ActivEssentials with CalciumXYMOGEN · off the market50 mg
• ActivEssentials With OncoPlex & D3XYMOGEN EP · off the market50 mg
• ActivEssentials with OncoPLEX & D3XYMOGEN · off the market50 mg
• ActiVitBeachBody20 mg

Where next?

• Liquid magnesium
• Magnesium capsules
• Magnesium drops
• Magnesium for women
• Magnesium gummies
• Magnesium powder
• Check an amount of magnesium
• Labels above the upper limit
• All ingredients