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 120 of 395), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Dicalcium MalateSolgar1,000 mg
- DiCalcium MalateThorne · off the market250 mg
- Dicalcium PhosphateBulkSupplements.com580 mg
- Dicalcium Phosphate (DCP)PureBulk.com466 mg
- Dicalcium Phosphate (DCP)BulkSupplements.com580 mg
- Diet CitrimaxSource Naturals189 mg
- Diet Citrimax 1,000 mgSource Naturals178 mg
- Diet Citrimax ComplexSource Naturals189 mg
- Diet DetoxGNC BodyDynamix155 mg
- Diet PyruvateSource Naturals339 mg
- Diet Pyruvate 750 mgSource Naturals360 mg
- Diet SupportNOW30 mg
- Diet-PhenSource Naturals85 mg
- Dietary Sulfur with AscorbatesDouglas Laboratories · off the market5 mg
- Dieter's Support Formula One Tablet DailySafeway Select300 mg
- Dieters' Formula Chitosan 500 mgVitamin World200 mg
- DietEzNutriCology300 mg
- Digest SupportNatrol60 mg
- Digest-AidHealth Thru Nutrition Naturally120 mg
- Digest-AidHealth Thru Nutrition120 mg
- Digest-Rite AdvancedNewtonEverett36 mg
- Digestion SupportNatures Plus AgeLoss · off the market50 mg
- Digestion SupportNaturesPlus AgeLoss50 mg as transcribed, likely a slip
- Digestive Advantage Daily ProbioticSchiff140 mg
- Digestive Advantage Daily Probiotics Digestive & Immune SupportSchiff140 mg
- Digestive BlendBarlean's27 mg
- Digestive ComfortPlanetary Herbals50 mg
- Digestive Enzyme ComplexIndiana Botanic Gardens30 mg
- Digestive Enzyme FormulaPuritan's Pride150 mg
- Digestive EnzymesTN Trusted Nutrients138 mg
- Digestive EnzymesSunshine Naturals47 mg
- Digestive EnzymesDaVinci Laboratories50 mg
- Digestive Enzymes With Ox Bile And Activated CharcoalSunshine Naturals · off the market47 mg
- Digestive Greens Tasty Mixed Berry FlavorBIOHM24 mg
- Digestive Probiotics + Multivitamins Women's Dual ActionNature Made250 mg
- Digestive Reds Tasty Red Berry FlavorBIOHM24 mg
- Digestive Vibrance Mandarin OrangeVibrant Health93 mg
- Digestizyme PlusEnergique46 mg
- DigestTabdoTERRA DigestZen200 mg
- Digital LiquidGood State50 mg
- DIMNutraBio62 mg
- DIM + CdgJarrow Formulas · off the market30 mg
- DIM +BioPerineApproved Science100 mg as transcribed, likely a slip
- DIM 100 mgNutraKey100 mg
- DIM 200NOW12 mg
- DIM 200 mgLuckyVitamin12 mg
- DIM 200 plus CDG 100Protocol For Life Balance12 mg
- DIM Complexelon50 mg
- DIM ComplexSupplement Spot50 mg
- DIM Diindolylmethane 100 mgMason Natural35 mg