Mineral · Supplement ingredient
Calcium
Calcium is listed on 25,901 U.S. supplement product labels in the NIH DSLD, #4 of 4,614 by label frequency.
- 25,901
- Products
- #4 of 4,614
- By frequency
- NIH
- Dosing fact sheet
Calcium dosing reference
NIH ODS Fact Sheet →- Recommended Dietary Allowance (RDA / AI)
- 1,000 mg for adults 19–50 (men), 1,000 mg for women 19–50; 1,200 mg for adults 51+ (women) and 71+ (men)
- Tolerable Upper Intake Level (UL)
- 2,500 mg per day for adults 19–50; 2,000 mg for adults 51+
- Drug interactions
- Reduces absorption of bisphosphonates, levothyroxine, quinolone and tetracycline antibiotics, iron supplements. Take 2+ hours apart.
- Pregnancy & lactation
- RDA during pregnancy and lactation is 1,000 mg (1,300 mg for adolescents 14–18).
Statement required by FDA: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Consult a licensed healthcare provider before starting, stopping, or combining any supplement, especially if you are pregnant, nursing, take prescription medication, or have a medical condition.
Source: https://ods.od.nih.gov/factsheets/Calcium-HealthProfessional/
How common is Calcium?
Number of supplement labels listing Calcium vs nearby mineral ingredients
- Silicon
Silicon
35,582 products
- Calcium
Calcium
25,901 products
- Sodium
Sodium
14,493 products
- Zinc 12,055
Zinc
12,055 products
- Potassium 11,807
Potassium
11,807 products
- Iron 8,704
Iron
8,704 products
Products containing Calcium
Nearby Ingredients in Mineral
Other ingredients in the Mineral category cataloged in the NIH DSLD. Useful for comparing how common different nutrients are across the US supplement market.
Nationwide ingredients with similar DSLD presence
Two peer sets for Calcium: closest on total DSLD label listings (25,901 here) and closest on distinct brands that list it (2,145 here). Peers exclude the same DSLD category, and rows stay link-disjoint so each axis is a distinct neighborhood.
Similar label frequency
Nearest other ingredients by distinct DSLD product labels (floored at ≥50), outside this category.
Similar brand breadth
Nearest other ingredients by distinct brands listing them (floored at ≥100 brands), distinct from the label-frequency row.
Frequently asked about Calcium
What is the Recommended Dietary Allowance (RDA) for Calcium? ▼
Is there an upper limit for Calcium? ▼
Does Calcium interact with medications? ▼
What about Calcium during pregnancy or breastfeeding? ▼
How many supplement products contain Calcium? ▼
Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD) · Dosing reference: NIH ODS Calcium Health Professional Fact Sheet. Regulatory reference: Source: Dietary Supplement Health and Education Act (DSHEA), 1994, 21 U.S.C. § 321(ff).
Disclaimer, Not Medical Advice: Information on this page is based on manufacturer-declared label data and is provided for educational and reference purposes only. It does not constitute medical, nutritional, or health advice. Consult a licensed healthcare provider before starting, stopping, or combining any supplement, especially if you are pregnant, nursing, take prescription medication, or have a medical condition.
Read our methodology , how this data is sourced, computed, and verified.
Every figure on PlainVitamins is rendered directly from the NIH Dietary Supplement Label Database (DSLD), no number is typed in by an editor. Ingredient figures are computed directly from the NIH DSLD, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.