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Iron supplements can cause several side effects, particularly when taken on an empty stomach. Research shows common side effects include:
- Gastrointestinal issues: constipation, nausea, stomach pain
- Black stools: a harmless but common occurrence
- Temporary tooth staining: can be prevented by using a straw and maintaining good oral hygiene
To minimize side effects, start with a lower dose and gradually increase it. Taking a slow-release formula or splitting the dose throughout the day can also help reduce digestive discomfort.
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Last Updated: October 3, 2025
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