Supplements
Iron in supplements · page 23
6,443 supplements on the U.S. market list Iron with an amount per serving. The official Tolerable Upper Intake Level for adults is 45 mg a day.
Tolerable Upper Intake Level (UL)
The highest daily amount that is unlikely to cause harm for almost all healthy people, from food, drinks and supplements combined.
| Age | Men | Women |
|---|---|---|
| 0-6 months | 40 mg | 40 mg |
| 7-12 months | 40 mg | 40 mg |
| 1–3 years | 40 mg | 40 mg |
| 4–8 years | 40 mg | 40 mg |
| 9–13 years | 40 mg | 40 mg |
| 14–18 years | 45 mg | 45 mg |
| 19–50 years | 45 mg | 45 mg |
| 51+ years | 45 mg | 45 mg |
Source: NIH ODS Iron Fact Sheet for Health Professionals, Table 3 (updated 2025-09-04).
Supplements with Iron
6,443 shown · page 23 of 135
Label data: NIH Office of Dietary Supplements, Dietary Supplement Label Database (dsld.od.nih.gov), public domain. Upper limits: NIH ODS Fact Sheets for Health Professionals (values from the Institute of Medicine, Food and Nutrition Board).