Iron supplements can cause several side effects, particularly when taken on an empty stomach. Studies show the most common side effects include:
- Constipation (most common)
- Nausea and stomach pain
- Black or dark stools
- Temporary tooth staining
To minimize these effects, start with a lower dose and gradually increase it. If constipation occurs, increase your fiber and water intake. Consider taking a slow-release formula if you’re particularly sensitive. Always consult your healthcare provider if side effects are severe or persistent.
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Last Updated: October 1, 2025
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