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 24 of 395), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Aloe Vera Juice Natural Wild Berry FlavorGNC Natural Brandin a blend
• Aloe Vera Juice Whole LeafLily of the Desert35 mg
• Aloe Vera Juice Whole Leaf FilteredLily of the Desert35 mg
• Aloe Vera Leaf Juice UnflavoredNature's Way165 mg
• Aloe Vera Super-Strength Freeze-DriedDH Desert Harvest60 mg
• Aloe Vera Wild Berry FlavoredNature's Way48 mg
• AloeAminos Power NutritionDr. LaMar's Productsin a blend
• Alpha Amino Fruit PunchCellucor10 mg
• Alpha Amino GrapeCellucor10 mg
• Alpha Amino Green AppleCellucor10 mg
• Alpha Amino Lemon LimeCellucor5 mg
• Alpha Amino Mixed BerryCellucor10 mg
• Alpha Amino Pink LemonadeCellucor10 mg
• Alpha Amino Ultimate Blueberry LemonadeCellucor400 mg
• Alpha Amino Ultimate Orange SherbetCellucor400 mg
• Alpha Amino Ultimate Strawberry CoconutCellucor400 mg
• Alpha Amino Xtreme Fruit PunchCellucor10 mg
• Alpha Amino Xtreme GrapeCellucor10 mg
• Alpha Amino Xtreme WatermelonCellucor10 mg
• Alpha Base Capsules with IronOrtho Molecular Products100 mg
• Alpha Base Capsules Without IronOrtho Molecular Products100 mg
• Alpha Base Premier PacksOrtho Molecular Products100 mg
• Alpha Base Tablets Without IronOrtho Molecular Products · off the market100 mg
• Alpha BoostInvictus Labs · off the market44.28 mg
• Alpha DailyOptimal Alpha175 mg
• Alpha Day Brain Focus FormulaPeak Performance Nutraceutics20 mg
• Alpha EAA Blueberry LemonadeNutraBio300 mg as transcribed, likely a slip
• Alpha EAA Cherry Lime SlushNutraBio Performance300 mg as transcribed, likely a slip
• Alpha EAA Cherry Lime SlushNutraBio300 mg as transcribed, likely a slip
• Alpha EAA Dragonfruit CandyNutraBio · off the market300 mg as transcribed, likely a slip
• Alpha EAA Dragonfruit CandyNutraBio Performance300 mg as transcribed, likely a slip
• Alpha EAA Grape Berry CrushNutraBio · off the market300 mg as transcribed, likely a slip
• Alpha EAA New York PunchNutraBio · off the market300 mg as transcribed, likely a slip
• Alpha EAA Peach TeaNutraBio300 mg as transcribed, likely a slip
• Alpha EAA Strawberry Lemon BombNutraBio · off the market300 mg as transcribed, likely a slip
• Alpha FUniversal Nutrition30 mg
• Alpha Fuel Testosterone SupportAlpha Fuel · off the market44.28 mg
• Alpha GPCNutraBio300 mg as transcribed, likely a slip
• Alpha GPC 600 mg CapsulesBulkSupplements.com60 mg
• Alpha GPC Capsules 300 mgBulkSupplements.com60 mg
• Alpha IQ MindRomeo Health20 mg
• Alpha Joint SupportOptimal Alphain a blend
• Alpha Keto Peach DreamscicleOptimal Alpha1,000 mg as transcribed, likely a slip
• Alpha Ketoglutaric Acid 300 mgKirkman27 mg
• Alpha Lipoic Acid + 270 mgNatural Grocers by Vitamin Cottage34 mg
• Alpha Lipoic Acid 100 mgThe Vitamin Shoppe75 mg
• Alpha Lipoic Acid 200 mgSource Naturals52 mg
• Alpha Lipoic Acid 200 mgWholeHealth49 mg
• Alpha Lipoic Acid 300 mgSource Naturals127 mg
• Alpha Lipoic Acid 300 mgWindmill Natural Vitamins70 mg

Where next?

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