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 135 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Kids Optimal MultivitaminSeeking Health150 mg
- Kids Optimal Multivitamin Iron-and Copper-FreeSeeking Health · off the market150 mg
- Kids SleepSmartyPants Functional126 mg
- Kids Sleep Chewable Natural Grape FlavorMommy's Bliss42 mg as transcribed, likely a slip
- Kids Vita Plus Natural Orange FlavorGuardian Health1.5 mg
- Kids Vitamins & Minerals Chewable Natural Black Cherry FlavorSolaray15 mg as transcribed, likely a slip
- Kids Yummy Cherry BerryGarden of Life Vitamin Code · off the market10 mg
- Kids' Calcium Magnesium Citrate Natural Cherry FlavorLifeTIME200 mg
- Kids' Calcium Magnesium Citrate Natural Mixed Fruit FlavorLifeTIME200 mg
- Kids' Magnesium CitrateLifeTime200 mg
- KidsActive Fruit Punch FlavorZahler · off the market300 mg
- KidsActive Fruit Punch FlavorAdvanced Nutrition by Zahler300 mg
- Kidstiks Groovy GrapeAmerican Health58 mg
- Kidstiks Tropical PunchAmerican Health58 mg
- Kidz 250 mg Vitamin C Fruit PunchEmergen-C60 mg
- Kidz Vitamin C 250 mg Fruit GrapeEmergen-C60 mg
- Kidz Vitamin C 250 mg Fruit OrangeEmergen-C60 mg
- Kidz Vitamin C 250 mg Fruit PunchEmergen-C60 mg
- Kill H20Insane Labz100 mg
- Kill It Fruit PunchRich Piana 5% Nutrition72 mg
- Kinder Calm (Peach-Berry)Priority One Nutritional Supplements · off the market50 mg
- Kinder LoveFloradix14.5 mg
- King MakerTop Shelf Grind150 mg
- King Mass XL Dark ChocolateRonnie Coleman Signature Seriesin a blend
- King Mass XL Strawberry MilkshakeRonnie Coleman Signature Seriesin a blend
- King Mass XL Vanilla Ice CreamRonnie Coleman Signature Seriesin a blend
- Kings BloodOlympus Labs90 mg
- Klean ElectrolytesKlean Athlete25 mg
- Klean Hydration Natural Orange FlavorKlean Athlete25 mg
- Klean MagnesiumKlean Athlete120 mg
- Klean MultivitaminKlean Athlete25 mg
- KMG PlusGenestra Brands40 mg
- Knock-OutSchiff10 mg
- Komodo Pump Blue Steel Blueberry MojitoAlpha Lion35 mg as transcribed, likely a slip
- Krebs Cycle ChelatesEnzymatic Therapy · off the market400 mg
- Krebs Cycle ChelatesNature's Way · off the market400 mg
- Krebs Cycle MagnesiumT/H/P/ Inc.50 mg
- Krebs Cycle Mineral ChelatesSwanson Premium Brand · off the market42 mg
- Krebs Cycle SupportNature's Way400 mg
- Krebs Ionized ChelatesIntegrative Therapeutics400 mg
- Krebs Magnesium PotassiumEnzymatic Therapy · off the market250 mg
- Krebs Magnesium Potassium ComplexNature's Way250 mg
- Krebs Magnesium-Potassium ChelatesIntegrative Therapeutics · off the market250 mg
- Krebs Magnesium-Potassium ChelatesEnzymatic Therapy · off the market250 mg
- Krebs Magnesium-Potassium ComplexIntegrative Therapeutics250 mg
- Ks KidneySystemic Formulas Bio Function16 mg
- KSR Kidney Stone ReliefCoast Science180 mg
- KundaliniANTIAGING Institute of California120 mg as transcribed, likely a slip
- L-Arginine Cardio CompleteHerbal Nutrition100 mg
- L-Arginine Complete Mixed Berry FlavorFNX0.02 mg as transcribed, likely a slip