PlainVitamins

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.

Magnesium: products by amount per serving0.3 mg3 mg30 mg300 mgDaily Value 420 mgUpper limit 350 mg
Magnesium: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mgDaily Value 420 mgUpper limit 350 mg
Magnesium: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mgDaily Value 420 mgUpper limit 350 mg
Magnesium: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mgDaily Value 420 mgUpper limit 350 mg
Magnesium: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mgDaily Value 420 mgUpper limit 350 mg
The amounts printed most often
Amount per servingProductsFor example
100 mg1,632 Maximum Nutrition Vanilla Bean (GNC Mega Men); Maximum Nutrition Vanilla Creme (GNC Women's Ultra Mega); Phyto-Estrogen Formula (GNC Women's)
50 mg1,243 Sport (GNC Mega Men); Sport Milk Chocolate (GNC Mega Men); Sport Vanilla Bean (GNC Mega Men)
200 mg880 LifeEssence (Pure Essence Labs); Bone Strength Take Care (New Chapter); Amped ECN NOS Blue Inferno Drink Mix (MET-Rx)
25 mg569 Nails (Viva Vitamins); Little Angels (Maximum Living); Aloe Boost (Aloe Life)
40 mg479 Spiru-Pro Soy Protein Drink With Spirulina Natural Vanilla (Vitamin World); SuperPump Max Raspberry Lemonade (Gaspari Nutrition); SuperPump Max Fruit Punch Blast (Gaspari Nutrition)
20 mg457 Calcium Ultra (CVS Pharmacy); 100% Whey Protein Fuel Vanilla Slam (Twinlab); Gymnema & Alpha-Lipoic Complex (AFI America's Finest)
250 mg437 Chelated Calcium Magnesium (Vitamin World); Organic Cal-Mag (Bio-Nutrient); Calcium Magnesium (Nature's Bounty)
400 mg426 Bone-Active Bone Reinforcer With Hydroxyapatite (Vitamin World); Chelated Calcium Magnesium Zinc (Radiance); Calcium Magnesium With Zinc (Naturalist)
300 mg415 Calcium Magnesium Liquid Natural Blueberry Flavor (Vitamin World); V.M.T. Extra Strength (Viva Vitamins); Muscle & Joint Complex (Indiana Botanic Gardens)
150 mg407 V.M.T. Regular Strength (Viva Vitamins); Axis HT (BSN); Muscle Support (Instaflex)

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.

Magnesium by formMagnesium oxide5,110, median 100 mgMagnesium citrate2,739, median 113 mgMagnesium glycinate1,307, median 113 mgMagnesium aspartate1,038, median 150 mgMagnesium malate903, median 100 mgMagnesium carbonate401, median 100 mgMagnesium gluconate254, median 100 mgMagnesium hydroxide211, median 60 mgMagnesium taurate139, median 300 mgMagnesium chloride95, median 75 mgMagnesium L-threonate72, median 144 mgMagnesium lactate55, median 55 mgMagnesium orotate37, median 71.5 mg
Magnesium by formMagnesium oxide5,110, median 100 mgMagnesium citrate2,739, median 113 mgMagnesium glycinate1,307, median 113 mgMagnesium aspartate1,038, median 150 mgMagnesium malate903, median 100 mgMagnesium carbonate401, median 100 mgMagnesium gluconate254, median 100 mgMagnesium hydroxide211, median 60 mgMagnesium taurate139, median 300 mgMagnesium chloride95, median 75 mgMagnesium L-threonate72, median 144 mgMagnesium lactate55, median 55 mgMagnesium orotate37, median 71.5 mg
Magnesium by formMagnesium oxide5,110, median 100 mgMagnesium citrate2,739, median 113 mgMagnesium glycinate1,307, median 113 mgMagnesium aspartate1,038, median 150 mgMagnesium malate903, median 100 mgMagnesium carbonate401, median 100 mgMagnesium gluconate254, median 100 mgMagnesium hydroxide211, median 60 mgMagnesium taurate139, median 300 mgMagnesium chloride95, median 75 mgMagnesium L-threonate72, median 144 mgMagnesium lactate55, median 55 mgMagnesium orotate37, median 71.5 mg
Magnesium by formMagnesium oxide5,110, median 100 mgMagnesium citrate2,739, median 113 mgMagnesium glycinate1,307, median 113 mgMagnesium aspartate1,038, median 150 mgMagnesium malate903, median 100 mgMagnesium carbonate401, median 100 mgMagnesium gluconate254, median 100 mgMagnesium hydroxide211, median 60 mgMagnesium taurate139, median 300 mgMagnesium chloride95, median 75 mgMagnesium L-threonate72, median 144 mgMagnesium lactate55, median 55 mgMagnesium orotate37, median 71.5 mg
Magnesium by formMagnesium oxide5,110, median 100 mgMagnesium citrate2,739, median 113 mgMagnesium glycinate1,307, median 113 mgMagnesium aspartate1,038, median 150 mgMagnesium malate903, median 100 mgMagnesium carbonate401, median 100 mgMagnesium gluconate254, median 100 mgMagnesium hydroxide211, median 60 mgMagnesium taurate139, median 300 mgMagnesium chloride95, median 75 mgMagnesium L-threonate72, median 144 mgMagnesium lactate55, median 55 mgMagnesium orotate37, median 71.5 mg
Magnesium: products naming each form, and their median amount per serving (DSLD version 9.4.0)
FormProductsShare of magnesium productsMedian per serving
Magnesium oxide5,11034%100 mg
Magnesium citrate2,73918%113 mg
Magnesium glycinate1,3079%113 mg
Magnesium aspartate1,0387%150 mg
Magnesium malate9036%100 mg
Magnesium carbonate4013%100 mg
Magnesium gluconate2542%100 mg
Magnesium hydroxide2111%60 mg
Magnesium taurate139under 1%300 mg
Magnesium chloride95under 1%75 mg
Magnesium L-threonate72under 1%144 mg
Magnesium lactate55under 1%55 mg
Magnesium orotate37under 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).

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.

Median magnesium per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
201131466 mg
2012880100 mg
20131,10380 mg
201471485 mg
201572960 mg
201666763 mg
2017691100 mg
201860862 mg
2019681100 mg
20201,283100 mg
20211,21075 mg
20221,325100 mg
20231,267100 mg
20241,479100 mg
20251,408100 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing magnesium by DSLD product type

Magnesium by product typeOther Combinations10,272Mineral1,506Botanical with Nutrients1,129Multi-Vitamin and Mineral (MVM)989Amino acid/Protein286Botanical56Single Vitamin and Mineral54Non-Nutrient/Non-Botanical47
Magnesium by product typeOther Combinations10,272Mineral1,506Botanical with Nutrients1,129Multi-Vitamin and Mineral (MVM)989Amino acid/Protein286Botanical56Single Vitamin and Mineral54Non-Nutrient/Non-Botanical47
Magnesium by product typeOther Combinations10,272Mineral1,506Botanical with Nutrients1,129Multi-Vitamin and Mineral (MVM)989Amino acid/Protein286Botanical56Single Vitamin and Mineral54Non-Nutrient/Non-Botanical47
Magnesium by product typeOther Combinations10,272Mineral1,506Botanical with Nutrients1,129Multi-Vitamin and Mineral (MVM)989Amino acid/Protein286Botanical56Single Vitamin and Mineral54Non-Nutrient/Non-Botanical47
Magnesium by product typeOther Combinations10,272Mineral1,506Botanical with Nutrients1,129Multi-Vitamin and Mineral (MVM)989Amino acid/Protein286Botanical56Single Vitamin and Mineral54Non-Nutrient/Non-Botanical47

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

Where next?