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Research demonstrates that ferrous sulfate has the highest bioavailability among iron supplements. However, other forms include:
- Ferrous gluconate: Gentler on the stomach
- Ferrous bisglycinate: Well-absorbed with fewer side effects
- Carbonyl iron: Slower release with reduced risk of overdose
The best form for you depends on your specific needs and tolerance. Some people may absorb liquid supplements better than tablets. Consider factors like side effects and cost when choosing a supplement type.
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Last Updated: October 5, 2025
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