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While iron supplements are generally safe, they can cause several side effects:

  • Constipation or diarrhea
  • Stomach pain and nausea
  • Dark stools
  • Temporary tooth staining

Studies indicate that taking supplements with food can reduce gastrointestinal side effects. Slow-release formulations may also help minimize digestive issues. If side effects persist, consult your healthcare provider about adjusting the dosage or trying a different form of iron.

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Last Updated: October 5, 2025

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