Iron
Also known as: ferrous sulfate, ferric oxide
Effective Dosage
8-18 mg daily
✓ What the Science Says
Iron is an essential mineral that plays a crucial role in the formation of hemoglobin, which carries oxygen in the blood. It is also important for energy metabolism and immune function. Supplementation is particularly effective in treating iron deficiency anemia.
✗ What It Doesn't Do
Iron supplements do not boost energy levels in individuals who are not iron deficient, nor do they enhance athletic performance in well-nourished individuals. Excessive iron intake can lead to toxicity and health issues.
Evidence-Based Benefits
Iron is an essential mineral that plays a crucial role in the formation of hemoglobin, which carries oxygen in the blood. It is also important for energy metabolism and immune function. Supplementation is particularly effective in treating iron deficiency anemia.
Strong EvidenceEffective at: 8-18 mg daily
Source: auto-research
Absorption & Bioavailability
Moderate - Iron from animal sources (heme iron) is better absorbed than iron from plant sources (non-heme iron). Vitamin C can enhance absorption.
Red Flags to Watch For
- 🚩 Watch for products claiming to cure fatigue without evidence of deficiency.
- 🚩 Beware of high-dose supplements that exceed recommended daily allowances.
Products Containing Iron
See how Iron is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-02-05