Different forms of iron supplements vary in absorption rates:
- Ferrous sulfate: Most common and well-absorbed
- Ferrous gluconate: Generally well-tolerated
- Ferrous bisglycinate: Higher absorption with fewer side effects
Research in the European Journal of Clinical Nutrition indicates that ferrous bisglycinate may have superior absorption rates compared to ferrous sulfate. Note: Liquid forms might be better absorbed than tablets, but individual responses can vary. Choose a form that you tolerate well and that fits your budget.
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Last Updated: August 22, 2025
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