Mineral · Supplement ingredient
Iron
Iron is listed on 8,704 U.S. supplement product labels in the NIH DSLD, #32 of 4,614 by label frequency.
- 8,704
- Products
- #32 of 4,614
- By frequency
- NIH
- Dosing fact sheet
Iron dosing reference
NIH ODS Fact Sheet →- Recommended Dietary Allowance (RDA / AI)
- 8 mg for adult men and women 51+; 18 mg for women 19–50
- Tolerable Upper Intake Level (UL)
- 45 mg per day for adults
- Drug interactions
- Reduces absorption of levodopa, levothyroxine, quinolone antibiotics. Calcium and PPIs reduce iron absorption. Vitamin C enhances absorption.
- Pregnancy & lactation
- RDA during pregnancy is 27 mg (highest of any life stage); lactation 9 mg (10 mg for adolescents).
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/Iron-HealthProfessional/
How common is Iron?
Number of supplement labels listing Iron 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 Iron
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 Iron: closest on total DSLD label listings (8,704 here) and closest on distinct brands that list it (1,180 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 Iron
What is the Recommended Dietary Allowance (RDA) for Iron? ▼
Is there an upper limit for Iron? ▼
Does Iron interact with medications? ▼
What about Iron during pregnancy or breastfeeding? ▼
How many supplement products contain Iron? ▼
Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD) · Dosing reference: NIH ODS Iron 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.