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

• Testrogain with ZMANewtonEverett70 mg
• Testrol Anabolic & Potency ActivatorGAT450 mg
• TESTROL OriginalGAT Sport450 mg
• TestRXTestRX200 mg
• Tesy 9Herbax10 mg
• Text X180 IgniteProForce Factor50 mg
• The 30 Day Beauty SecretFuturebiotics150 mg
• The Better Vitamin C 1000 mg Plus Electrolytes Natural Orange FlavorEster-C60 mg
• The Bone Density FormulaRx Vitamins500 mg
• The Brain PillCognizance · off the market0.05 mg as transcribed, likely a slip
• The CleanerCentury Systemsin a blend
• The Cleaner Men's FormulaCentury Systems · off the marketin a blend
• The Cleaner Women's 14 Day FormulaCentury Systemsin a blend
• The Cleaner Women's 7 Day FormulaCentury Systemsin a blend
• The Cleaner Women's FormulaCentury Systems · off the marketin a blend
• The Essential MultiNutri-Rich25 mg
• The Essential Prenatal Ultra SoftgelsOLLY · off the market50 mg
• The Grind Apple Berry Flavored Swamp BeastAxe & Sledge Supplements10 mg
• The Grind Big MelonsAxe & Sledge Supplements10 mg
• The Grind DeadliftsAxe & Sledge Supplements10 mg
• The Grind Dragon Fruit YuzuAxe & Sledge Supplements10 mg
• The Grind HWMFAxe & Sledge Supplements10 mg
• The Grind ICEE Blue RaspberryAxe & Sledge Supplements10 mg
• The Grind ICEE CherryAxe & Sledge Supplements10 mg
• The Grind Orange Mango Flavored Shark BiteAxe & Sledge Supplements10 mg
• The Grind Scorpion VenomAxe & Sledge Supplements10 mg
• The Grind Tropical ThunderAxe & Sledge Supplements10 mg
• The Grind Unicorn BloodAxe & Sledge Supplements10 mg
• The Grind Unicorn Blood Rainbow Sherbert FlavoredAxe & Sledge Supplements · off the market10 mg
• The Grind Your Mom's LemonadeAxe & Sledge Supplements10 mg
• The Grind Your Mom's Sweet PeachAxe & Sledge Supplements10 mg
• The Kitchen SinkCFU Distribution Co. · off the market150 mg
• The Original Oxy-CleanseEarth's Bounty346 mg
• The Original Oxy-EnergizerProCaps Laboratories122 mg
• The Original Sleep Formula 786MaritzMayer Laboratories · off the market60 mg
• The Purity Super PillPurity Products30 mg
• The Real Red Pill PlusInfoWars Life400 mg
• The Step Up by BarimeltsBariMelts40 mg
• The Stuff Detox Intense Herbal Cleansing Citrus FlavoredDetoxify20 mg
• The Stuff Detox Intense Herbal Cleansing Ferocious FruitDetoxify40 mg
• The Stuff Detox Intense Herbal Cleansing Fruit FlavoredDetoxify20 mg
• The Stuff Detox Intense Herbal Cleansing Grape FlavoredDetoxify20 mg
• The Stuff Detox Intense Herbal Cleansing Gushing GrapeDetoxify · off the market20 mg
• The Stuff Extra Intense Herbal Cleansing Ferocious FruitDetoxify25 mg
• The Stuff Liquid Intense Herbal Cleansing Citrus ExplosionDetoxify20 mg
• The Stuff Liquid Intense Herbal Cleansing Gushing GrapeDetoxify20 mg
• The Ultimate Calcium Mineral FormulaRoex267 mg
• The Ultimate Diabetic Circulation BoosterHampshire Labs · off the market319.2 mg
• The Woman's FormulaBronson Laboratories · off the market75 mg
• The Woman's FormulaBronson · off the market75 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