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.
- Products listing it
- 19,72417,831 print an amount; 1,556 list it inside a blend without an amount
- Median per serving
- 115 mgmiddle half 50 mg to 252 mg
- FDA Daily Value
- 1,300 mgthe median is 9% of it
- Adult upper limit (IOM)
- 2,500 mg83 products go above it a day
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).
Products by amount of calcium per serving
18,010 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 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.
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 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.
Products by the form of calcium on the label
Count, and the median amount per serving in that form.
| Form | Products | Share of calcium products | Median per serving |
|---|---|---|---|
| Calcium carbonate | 4,133 | 21% | 200 mg |
| Calcium phosphate | 2,838 | 14% | 108 mg |
| Calcium citrate | 2,770 | 14% | 200 mg |
| Calcium malate | 681 | 3% | 200 mg |
| Calcium lactate | 343 | 2% | 75 mg |
| Calcium gluconate | 283 | 1% | 250 mg |
| Calcium hydroxyapatite | 270 | 1% | 500 mg |
Source: the form each label gives for its calcium row (DSLD "forms"), current labels.
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.
| Year | Products | Median per serving |
|---|---|---|
| 2011 | 433 | 150 mg |
| 2012 | 1,075 | 200 mg |
| 2013 | 1,258 | 162 mg |
| 2014 | 867 | 120 mg |
| 2015 | 922 | 119 mg |
| 2016 | 902 | 117 mg |
| 2017 | 975 | 115 mg |
| 2018 | 827 | 100 mg |
| 2019 | 974 | 106.5 mg |
| 2020 | 1,729 | 100 mg |
| 2021 | 1,404 | 100 mg |
| 2022 | 1,720 | 115 mg |
| 2023 | 1,564 | 100 mg |
| 2024 | 1,789 | 106 mg |
| 2025 | 1,571 | 118 mg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing calcium by DSLD product type
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 89 of 395), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Century CompleteTop Care200 mg
- Century Complete Multivitamin/Multimineral SupplementEqualine200 mg
- Century FormulaSwanson Premium Brand · off the market162 mg
- Century Formula Without IronSwanson Premium Brand · off the market162 mg
- Century MatureSmart Sense220 mg
- Century MatureGoodSense220 mg
- Century MatureSignature Care220 mg
- Century MatureMeijer220 mg
- Century menSignature Care210 mg
- Century Men'sEqualine210 mg
- Century Senior 50+ FormulaSafeway Care220 mg
- Century Senior Ultimate Men'sTop Care250 mg
- Century Ultimate Men'sTop Care210 mg
- Century Ultimate Men's Senior FormulaSafeway Care250 mg
- Century Ultimate Women'sTop Care500 mg
- Century WomenGoodSense200 mg
- Century Women's Complete 50+TopCare Health300 mg
- Cerenity PMOrtho Molecular Products250 mg
- CereVenPremier Research Labs20 mg
- CeroviteRugby200 mg
- Cerovite Jr.Rugby108 mg
- Cerovite SeniorRugby220 mg
- CertaVite SeniorMajor220 mg
- CertaVite with AntioxidantsMajor200 mg
- Certified Organic Delicious Red & Green Superfood for KidsPeak Performance · off the market11 mg
- Certified Organic GreensVSN Vital Strength Nutrition · off the market8 mg
- Certified Organic Nopal Juice BlendDynamic Health91 mg
- Certified Organic Spirulina Powder PureNOW5 mg
- Certified Organic Triple GreensOrganic Bros Purity Products50 mg
- CgczAngstrom Minerals · off the marketin a blend
- Ch-Ch-Ch-Chia Omega-3 Chia SeedsJoseph Enterprisesin a blend
- Cha De Bugre PowderBIOVEA Natural Foodsin a blend
- Chaga Mushroom CapsulesHealth Ranger Select0.4 mg
- ChagaMilkNorth American Herb & Spicein a blend
- Chain Gang Bad A$$ BubblegumChaotic-Labz117 mg
- Chain Gang BCAA Juicyfruit JellyfishChaotic Labz39 mg
- Chainsaw Blue BombApollon Nutrition40 mg
- Chamomile SleepPlanetary Herbals155 mg
- Champion BlendIsotonix · off the market166 mg
- ChaosXcel Sports Nutrition · off the marketin a blend
- Charge Blood OrangeRoyal Sport · off the market20 mg
- Charge Raspberry LemonadeRoyal Sport · off the market20 mg
- Charge Strawberry KiwiRoyal Sport · off the market50 mg
- Charge Tropical PunchRoyal Sport · off the market20 mg
- Chela-DetoxSource Naturals70 mg
- Chelated Cal MagThe Vitamin Shoppe500 mg
- Chelated Cal-MagVitaCeutical Labs1,000 mg
- Chelated Cal-magVitamer Laboratories1,000 mg
- Chelated Cal-MagMyTrition500 mg
- Chelated Cal-MagNatural Nutra1,000 mg