Common side effects of iron supplements, according to clinical research, include:
- Constipation (most common)
- Nausea and stomach pain
- Black or dark stools
- Temporary teeth staining
To minimize side effects, start with a lower dose and gradually increase it. Taking a stool softener can help with constipation. Liquid iron formulations may cause less digestive distress than tablets. If side effects persist, consult your healthcare provider about switching to a different form of iron or adjusting the dosage.
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Last Updated: September 9, 2025
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