Skip to main content
PlainVitamins

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
Subscribe to updates
Verify with NIH DSLD → · FDA Daily Value reference → · Page 116 of 519

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

products
Source NIH Dietary Supplement Label Database (DSLD) As of 2026

Products containing Calcium

L-Glutamine 500 mg
Martin Avenue Pharmacy
6 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Vitamin World
6 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Vitamin World
6 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Indiana Botanic Gardens
4 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Spring Valley
6 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Glutamine 500 mg
Bronson
6 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Bronson
6 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Best Naturals
8 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Meijer
9 ingredients · Amino acid/Protein
On Market
L-Glutamine 500 mg
Puritan's Pride
5 ingredients · Amino acid/Protein
On Market
L-Glutathione 100 mg
Advanced Research
9 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Glutathione 100 mg
Swanson
4 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Lysine 1,000 mg
Nature's Truth
8 ingredients · Amino acid/Protein
On Market
L-Lysine 1,000 mg
up&up
8 ingredients · Amino acid/Protein
On Market
L-Lysine 1,000 mg
Nature's Truth
8 ingredients · Amino acid/Protein
On Market
L-Lysine 1000 mg
Nova Nutritions
8 ingredients · Amino acid/Protein
On Market
L-Lysine 1000 mg
up&up
8 ingredients · Amino acid/Protein
On Market
L-Lysine 1000 mg
Best Naturals
8 ingredients · Amino acid/Protein
On Market
L-Lysine 1000 mg
CVS Health
12 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Vitabase
6 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Martin Avenue Pharmacy
6 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
up&up
7 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Wonder Laboratories
5 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Wonder Laboratories
5 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
CVS Health
12 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
PurePremium Supplements
8 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Best Naturals
8 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Windmill Natural Vitamins
9 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Nature's Truth
8 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Ron Teeguarden Nutraceuticals
8 ingredients · Amino acid/Protein
On Market
L-Lysine 500 mg
Mason Natural
7 ingredients · Other Combinations
On Market
L-Lysine Extra Strength 1000 mg
Bronson
9 ingredients · Amino acid/Protein
On Market
L-Lysine Extra Strength 1000 mg
Bronson
9 ingredients · Amino acid/Protein
On Market
L-Lysine Extra Strength 1000 mg
Bronson
9 ingredients · Amino acid/Protein
On Market
L-Lysine HCl 500 mg
Windmill
5 ingredients · Amino acid/Protein
On Market
L-Lysine HCl 500 mg
Foods Plus
5 ingredients · Amino acid/Protein
On Market
L-Lysine Pharmaceutical Grade
Swanson
3 ingredients · Amino acid/Protein
On Market
L-Methionine Free Form 500 mg
Vitamin World
7 ingredients · Amino acid/Protein
On Market
L-Methylfolate 15mg
Woodstock Vitamins
16 ingredients · Vitamin
On Market
L-Methylfolate Calcium 15 mg
Virtus Pharmaceuticals
8 ingredients · Vitamin
On Market
L-Methylfolate Calcium 7.5 mg
Virtus Pharmaceuticals
12 ingredients · Vitamin
On Market
L-OptiZinc Zinc 20 mg
Newflower Farmers Markets
7 ingredients · Mineral
On Market
L-Ornithine Alpha-Ketoglutarate
Douglas Laboratories
5 ingredients · Amino acid/Protein
On Market
L-Ornithine L-Aspartate 3000 mg
SNS Serious Nutrition Solutions
6 ingredients · Non-Nutrient/Non-Botanical
On Market
L-Phenylalanine 500 mg
Best Naturals
8 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Source Naturals
7 ingredients · Amino acid/Protein
On Market
L-Phenylalanine 500 mg
Best Naturals
8 ingredients · Amino acid/Protein
On Market
L-Proline L-Lysine 275 mg / 275 mg
Source Naturals
15 ingredients · Botanical with Nutrients
On Market
L-Serine 500 mg
Swanson
4 ingredients · Amino acid/Protein
On Market
L-Taurine 1000 mg
Puritan's Pride
5 ingredients · Non-Nutrient/Non-Botanical
On Market

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.

Compare Calcium vs Silicon →

Silicon
35,582 products · Mineral
Sodium
14,493 products · Mineral
Zinc
12,055 products · Mineral
Potassium
11,807 products · Mineral
Iron
8,704 products · Mineral

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? ▼
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). The RDA is the average daily intake sufficient to meet the nutrient requirements of nearly all (97–98%) healthy people. Source: NIH Office of Dietary Supplements.
Is there an upper limit for Calcium? ▼
2,500 mg per day for adults 19–50; 2,000 mg for adults 51+ (Tolerable Upper Intake Level, UL, the maximum daily intake unlikely to cause adverse health effects in the general population).
Does Calcium interact with medications? ▼
Reduces absorption of bisphosphonates, levothyroxine, quinolone and tetracycline antibiotics, iron supplements. Take 2+ hours apart. This is a partial list, always discuss supplement use with a pharmacist or prescribing provider.
What about Calcium during pregnancy or breastfeeding? ▼
RDA during pregnancy and lactation is 1,000 mg (1,300 mg for adolescents 14–18).
How many supplement products contain Calcium? ▼
25,901 supplement product labels in the NIH DSLD currently lists Calcium as an ingredient. By label frequency it ranks #4 of 4,614 among ingredients PlainVitamins ranks (same sort as /rankings/most-common-ingredients). Browse them below.

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.