The most effective forms of iron supplements, according to clinical research, include:
- Ferrous sulfate: Most common and cost-effective
- Ferrous bisglycinate: Better absorbed and gentler on stomach
- Ferrous gluconate: Less iron content but fewer side effects
Ferrous forms are generally better absorbed than ferric forms. Liquid iron supplements may be preferred for children or those who have difficulty swallowing pills. Slow-release formulations can help reduce gastrointestinal side effects but may have lower absorption rates. Choose supplements with USP verification for quality assurance.
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Last Updated: August 24, 2025
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