A form of magnesium
Magnesium carbonate supplements
401 magnesium products in the NIH label database list magnesium as magnesium carbonate (3% of the 15,088 magnesium products); their median is 100 mg of magnesium per serving, against 86 mg across all magnesium products; the 43 whose only supplement ingredient is magnesium list a median of 325 mg (DSLD version 9.4.0, January 2026).
How does magnesium carbonate compare with the other forms?
The median amount of magnesium per serving in products naming each form; the count in brackets. The amount is the magnesium the label gives, as printed (the Supplement Facts row normally states the element; a row named as the compound usually gives the compound's weight and is left out of these figures).
Median magnesium per serving by form
Source: Supplement Facts rows and their forms, NIH ODS Dietary Supplement Label Database version 9.4.0, current labels.
- Products
- 401299 on the market
- Median magnesium per serving
- 100 mgall magnesium products: 86 mg
- Share of magnesium products
- 3%401 of 15,088
Is the amount the magnesium or the whole magnesium carbonate?
A Supplement Facts row normally states the magnesium itself (a row like "Magnesium (as magnesium carbonate)"); a row named as the compound (a row like "Magnesium carbonate") usually states the compound's weight, which includes what the magnesium is bound to and is larger than the magnesium it supplies. The front of a bottle may print either. Of the 401 products here, 399 give the magnesium in its own row (4 of them an amount far outside what other labels list, or one their own %DV disagrees with); 2 give only a row named as the compound, left out of the medians and counts on this site.
The adult Tolerable Upper Intake Level for magnesium is 350 mg a day; it covers magnesium from supplements and medicines only, not food or water. At the most servings their labels direct, 58 of the 395 magnesium carbonate products with a plausible amount (14.7%) give more than that.
Source: Supplement Facts rows of each product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; upper limit: Institute of Medicine Dietary Reference Intakes (2011) (what counts as plausible).
What else do these products contain?
| Ingredient | Share of these products | Median here | Median, all products |
|---|---|---|---|
| Calcium | 72% | 110 mg | 115 mg |
| Vitamin C | 62% | 500 mg | 100 mg |
| Potassium | 55% | 134 mg | 99 mg |
| Zinc | 47% | 3 mg | 11 mg |
| Vitamin B6 | 42% | 10 mg | 6 mg |
| Vitamin B12 | 41% | 25 mcg | 36 mcg |
| Manganese | 39% | 0.75 mg | 2 mg |
| Folate | 37% | 30 mcg | 400 mcg |
| Niacin | 36% | 5 mg | 20 mg |
| Pantothenic Acid (Vitamin B5) | 35% | 2.5 mg | 12 mg |
Which products are they?
60 of the 401 (on-market products first, the newest label first), ordered by the amount of magnesium per serving, largest first; an amount that looks like a slip or a compound's weight comes last, marked.
- Simply Calm Powder Cherry FlavorBluebonnet420 mg
- Simply Calm Powder Orange Citrus FlavorBluebonnet420 mg
- Simply Calm Powder Raspberry Lemon FlavorBluebonnet420 mg
- Simply Calm Powder UnflavoredBluebonnet420 mg
- Calming Day LemonJarrow Formulas350 mg
- Magnesium Night High Absorption 325 mg Naturally FlavoredNatrol325 mg
- Women's HealthIsotonix Essentials325 mg
- Calcium Plus Raspberry-Lemonade FlavorPure Essence Ionic-Fizz300 mg
- Magnesium Plus Orange-Vanilla FlavorPure Essence Ionic-Fizz300 mg
- Magnesium Plus Mixed Berry FlavorPure Essence Ionic-Fizz300 mg
- Magnesium Plus Raspberry-Lemonade FlavorPure Essence Ionic-Fizz300 mg
- Super D-K Calcium Plus Mixed Berry FlavorPure Essence Ionic-Fizz300 mg
- Super D-K Calcium Plus Orange-Vanilla FlavorPure Essence Ionic-Fizz300 mg
- Calcium Plus Orange-Vanilla FlavorPure Essence Ionic-Fizz300 mg
- Super D-K Calcium Plus Raspberry-Lemonade FlavorPure Essence Ionic-Fizz300 mg
- Calcium Plus Mixed Berry FlavorPure Essence Ionic-Fizz300 mg
- Magnesium Complex 300 mgLake Avenue Nutrition300 mg
- Turn DownIsotonix Essentials300 mg
- MagneCal DUSANA260 mg
- Effervescent Vitamin C Magnesium CrystalsLife Extension250 mg
- Cal-Mag PlusNutrients for Health250 mg
- HealthPakUSANA243 mg
- Multivitamin Fifty PlusIsotonix200 mg
- Spectra WomanDaVinci Laboratories180 mg
- Hypo-Aller CNutriBiotic Immunity175 mg
- LifeEssence Powder Lemon-Lime FlavorPure Essence150 mg
- Anti-AgingIsotonix Essentials150 mg
- RestorateFitLine134 mg
- AlmasedAlmased118 mg
- BeWell Daily Multivitamin & MineralArbonne100 mg
- Prenatal Activated MultivitaminIsotonix100 mg
- pH AdjustHealth Products Distributors99 mg
- Garcinia Oolong Tea PriorityLife Priority84 mg
- NocovidiumWarrior Essentials84 mg
- Calcium Wafers Chocolate FlavoredWonder Laboratories80 mg
- Ascorbate Bio-C with Bioflavonoids and MineralsNutriBiotic Immunity75 mg
- Buffered Vitamin CNutriBiotic Immunity65 mg
- Mineral XcelNeurobiologix60 mg
- Chewable Calcium Citrate 500 mg Calcium 500 IU Vitamin D3 Wild CherryBariatric Advantage56 mg
- Power Cocktail Junior Natural Orange FlavouredFitLine55 mg
- Immune+ RaspberryEmergen-C53 mg
- 1,000 mg Vitamin C Super OrangeEmergen-C53 mg
- MultimineralIsotonix50 mg
- Chewable Calcium Citrate 500 mg Calcium 500 IU Vitamin D3 ChocolateBariatric Advantage42 mg
- Chewable Calcium Citrate 500 mg Calcium 500 IU Vitamin D3 CinnamonBariatric Advantage42 mg
- Esophageal Guardian Berry FlavorLife Extension40 mg
- EsophaSootheNutra BioGenesis40 mg
- Lemon Electro-CNutriBiotic Immunity31 mg
- Electro-C CherryNutriBiotic Immunity31 mg
- UsanimalsUSANA25 mg
- Essential ElectrolytesNutriBiotic Performance25 mg
- Ultimate AntioxidantNutrients for Health25 mg
- Effervescent Effer-Energy Tropical Punch FlavorNOW Sports25 mg
- Effervescent Effer-Hydrate Lemon Lime FlavorNOW Sports25 mg
- Effervescent Effer-Hydrate Mixed Berry FlavorNOW Sports25 mg
- Effervescent Effer-Hydrate Orange Strawberry FlavorNOW Sports25 mg
- MultivitaminIsotonix25 mg
- Multivitamin with IronIsotonix25 mg
- Hydration Raspberry LemonadeNuun20 mg
- MultivitaminDNA Miracles Isotonix10 mg
Source: NIH ODS Dietary Supplement Label Database version 9.4.0; the form each label names for its row. Daily Values: the FDA's Daily Value page.
Which brands make them?
Emergen-C (53), Natural Vitality (22), Isotonix (13), American Health (11), Bronson (11), NOW (11), Pure Essence Ionic-Fizz (9), NOW Sports (8), The Vitamin Shoppe (7), NutriCology (7).