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 24 of 302), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Appetite BoostThompson750 mg
- Appetite SuppressantYes You Can!50 mg
- Apple Cider Vinegar +KetoNutriFlairin a blend
- Aqua Mag-ClBiotics Research Corporation200 mg
- Aqua-B6Anabolic Laboratories · off the market75 mg
- Aqua-FlowEnzymatic Therapy · off the market50 mg
- Aqua-FlowNature's Way50 mg
- Aqueous Multi-PlusBiotics Research Corporation10 mg
- AR-5 Juicy GrapeAST Sports Science68 mg
- AR-5 Lemon IceAST Sports Science68 mg
- ArbuterolUniversal50 mg
- Area 51ATS Labs200 mg
- AREDS 2 Plus Multi-Vitamin TabletEyePromise100 mg
- AREDS 2 Plus TabletEyePromise · off the market100 mg
- AREDS 2 Plus TabletEye Promise · off the market100 mg
- ArginCorMetagenics · off the market200 mg
- ArjunaR-U-Ved300 mg as transcribed, likely a slip
- Arjuna-HeartAyush Herbs300 mg
- ARM Plus+ Fruit SmoothieMax Muscle Nutrition180 mg as transcribed, likely a slip
- ARM Plus+ Intense StrawberryMax Muscle Nutrition180 mg as transcribed, likely a slip
- ARM Plus+ Orange Citrus BlastMax Muscle Nutrition180 mg as transcribed, likely a slip
- ARM Plus+ Peach Mango RushMax Muscle Nutrition180 mg as transcribed, likely a slip
- ARM Plus+ Tropical Fruit PunchMax Muscle Nutrition180 mg as transcribed, likely a slip
- ARM Plus+ Watermelon SplashMax Muscle Nutrition180 mg as transcribed, likely a slip
- ArmorEu Natural20 mg
- Armor-VMusclePharm · off the market94 mg
- Armor-V Multi-Nutrient ComplexMP MusclePharm94 mg
- Arnge Krush Blue HawaiiBioRhythm · off the market200 mg
- Arnge Krush California RedBioRhythm · off the market200 mg
- Arnge Krush Florida OrangeBioRhythm · off the market200 mg
- Arnold Iron Dream Fruit PunchMusclePharm125 mg
- Arnold Iron Dream GrapeMusclePharm125 mg
- Arnold Iron PackMusclePharm58 mg
- Arnold Iron PackArnold Schwarzenegger Series58 mg
- Arsenal Training PacksMET-Rx50 mg
- ARTA JointezSystemic Formulas Bio Challenge18 mg
- Arth-PlusMicroTech Professional Formulations0.64 mg as transcribed, likely a slip
- Arth-Support FormulaDouglas Laboratories Ultra Preventive 2000 Series · off the market300 mg as transcribed, likely a slip
- Arth-Support FormulaDouglas Laboratories · off the market300 mg
- Artho Joint ComplexProfessional Botanicals57 mg as transcribed, likely a slip
- Artho-PakDC33 mg
- ARTHOJointWonder Laboratories13 mg
- ArthoplexDC13 mg
- Arthri-D3Arthri-D40 mg
- Arthri-Flex Advantage21st Century · off the market200 mg
- Arthri-Flex Advantage + Vitamin D321st Century HealthCare · off the market200 mg
- Arthri-Flex Advantage + Vitamin D321st Century200 mg
- ArthritinVAXA3.2 mg
- Arthro-SynDouglas Laboratories125 mg
- AS 10 LifeAmeriSciences · off the market100 mg