Iron
Iron is declared on US Supplement Facts panels in mg. Its Daily Value for adults and children 4 years and older is 18 mg.
- Also known as
- ferrous fumarate, ferrous sulfate, ferrous bisglycinate
- Typical label unit
- mg
Reference values by market
| Market | Reference value | Source | Status |
|---|---|---|---|
| United States — Daily Value | 18 mg | 21 CFR 101.9 21 CFR 101.9(c)(8)(iv) — RDI table, adults and children ≥ 4 years (eCFR up to date as of 10/01/2026) |
Verified |
| United Kingdom — NRV | 14 mg | Retained Reg. 1169/2011 Regulation (EU) No 1169/2011, Annex XIII, Part A, point 1 |
Verified |
| European Union — NRV | 14 mg | Reg. (EU) 1169/2011, consolidated 01.04.2025 (amended by M1 1155/2013, M2 78/2014, M3 2015/2283, M4 2024/2512 — none amend Annex XIII) Reg. (EU) 1169/2011 Annex XIII Part A point 1 (verified 2026-10-04) |
Verified |
Forms found in supplements
- Ferrous and ferric iron salts (e.g. ferrous sulfate, ferrous gluconate, ferric citrate, ferric sulfate)
- Heme iron polypeptides
- Carbonyl iron
- Iron amino-acid chelates
- Polysaccharide-iron complexes
Source: NIH ODS fact sheet (updated 2025-09-04)
On a Supplement Facts label, the source form can be shown in parentheses after the nutrient name, for example “(as …)”. In the generator, use the Source / form field. (21 CFR 101.36 (d))
Labeling notes
- Elemental iron by weight: ferrous fumarate 33%, ferrous sulfate 20%, ferrous gluconate 12%. — NIH ODS fact sheet (updated 2025-09-04)
This page describes how the ingredient is labeled. It does not make or support any health claim.
Sources
- Iron — Health Professional Fact Sheet — NIH Office of Dietary Supplements (NIH ODS fact sheet (updated 2025-09-04))