mineral

Calcium supplements

Half of the 17,831 calcium supplements in the NIH label database that print an amount list 115 mg or less per serving; the middle half list 50 mg to 252 mg, and 1 in 213 of the 17,666 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 376 products whose only supplement ingredient is calcium list a median of 300 mg, and 1 in 125 of them give more than the upper limit.

How much calcium do supplements contain?

The median product lists 115 mg per serving. One in ten lists 23 mg or less, one in ten 540 mg or more. The amount printed most often is 100 mg (1,005 products).

How do the amounts compare with the Daily Value and the upper limit?

The FDA Daily Value for calcium is 1,300 mg (adults and children 4 and older). The median product gives 9% of it per serving; the 90th percentile 42%.

The adult Tolerable Upper Intake Level is 2,500 mg a day (total intake, adults 19-50 (2,000 mg from 51 years)). At the most servings their labels direct, 83 of the 17,666 products with a plausible amount (0.5%) 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 calcium do labels name?

Calcium carbonate is the form named most often: 4,133 of the 19,724 calcium products (21%), ahead of calcium phosphate (2,838, 14%) and calcium citrate (2,770, 14%). A product naming two forms counts in both; the table below gives every form.

• Calcium carbonate
• Calcium phosphate
• Calcium citrate
• Calcium malate
• Calcium lactate
• Calcium gluconate
• Calcium hydroxyapatite

Which products list the most calcium?

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).

• VanillaON Optimum Nutrition2,070 mg
• StrawberryON Optimum Nutrition2,070 mg
• BananaON Optimum Nutrition2,070 mg
• Mass Tech Cookies and CreamMuscleTech2,000 mg
• Chewable Calcium Citrate 500 mg Calcium 500 IU Vitamin D3 Wild CherryBariatric Advantage2,000 mg
• ChocolateON Optimum Nutrition1,990 mg
• Super Mass Gainer Cookies & CreamDymatize1,950 mg
• Super Mass Gainer Gourmet VanillaDymatize1,950 mg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 150 mg; those entered in 2025, 118 mg.

In which products and brands?

Brands listing it most: Douglas Laboratories (274), Nature's Plus (236), Source Naturals (203), Nature's Way (200), NutraBio (189), Bronson (162), 21st Century (160), NOW (146), Country Life (138), The Vitamin Shoppe (127).

Every product listing calcium

19,724 products, A to Z by name (page 45 of 395), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• BiotinJarrow Formulas · off the market145 mg
• BiotinHerbadiet190 mg as transcribed, likely a slip
• BiotinDaVinci Laboratories200 mg
• Biotin 1,000 mcgCarlson26 mg
• Biotin 1,000 mcgWindmill Natural Vitamins · off the market70 mg
• Biotin 1,000 mcgNatrol66 mg
• Biotin 1,000 mcgWindmill70 mg
• Biotin 10,000 mcgNova Nutritions66 mg
• Biotin 10,000 mcg21st Century96 mg
• Biotin 10,000 mcgaSquared Nutrition176 mg
• Biotin 10,000 mcg1 Body176 mg
• Biotin 10,000 mcgWindmill Natural Vitamins · off the market25 mg
• Biotin 10,000 mcgOL Olympian Labs66 mg
• Biotin 10,000 mcgNatrol66 mg
• Biotin 10,000 mcgWindmill25 mg
• Biotin 10,000 mcg Maximum StrengthNatrol · off the market66 mg
• Biotin 10,000 mcg Plus Keratin 100 mgMason Natural44 mg
• Biotin 1000 mcgBronson Laboratories · off the market45 mg
• Biotin 1000 mcgNatural Factors25 mg
• Biotin 1000 mcgBronson45 mg
• Biotin 1000 mcgGNC90 mg
• Biotin 5 mgPhysioLogics · off the market148 mg
• Biotin 5,000 mcgBest Naturals222 mg
• Biotin 5,000 mcgWindmill Natural Vitamins · off the market30 mg
• Biotin 5,000 mcgWindmill30 mg
• Biotin 5,000 mcg Extra StrengthNatrol66 mg
• Biotin 5000GNC AMP Advanced Muscle Performance0.17 mg as transcribed, likely a slip
• Biotin 5000 mcgCVS Pharmacy222 mg
• Biotin 5000 mcgSundown Naturals · off the market243 mg
• Biotin 5000 mcgExchange Select66 mg
• Biotin 5000 mcgCVS Health222 mg
• Biotin 5000 mcgKroger222 mg
• Biotin 5000 mcgSundown200 mg
• Biotin 5000 mcgGNC170 mg
• Biotin 5000 mcgMeijer200 mg
• Biotin 5000 mcg21st Century113 mg
• Biotin 5000 mcgRite Aid Pharmacy160 mg
• Biotin 5000 mcgNatural Factors125 mg
• Biotin 5000 mcgJarrow Formulas145 mg
• Biotin 5000 mcgWalgreens55 mg
• Biotin 5000 mcgDr. Rico Perez113 mg
• Biotin 600 mcgGNC95 mg
• Biotin 800 mcg21st Century88 mg
• Biotin For Hair & Nails Extra StrengthNatrol66 mg
• Biotin PureiPro Organic Supplements · off the market176 mg
• BioTrust Low Carb Milk ChocolateBioTrust · off the market319.7 mg
• BioTrust Low Carb Vanilla CreamBioTrust322.11 mg
• Bitter MelonSource Naturals46 mg
• Bitter Melon 500 mgPlanetary Herbals44 mg
• Black Cherry ConcentrateOnly Natural · off the marketin a blend

Where next?

• Calcium gummies
• Calcium powder
• Liquid calcium
• Check an amount of calcium
• Labels above the upper limit
• All ingredients