fb61bd32_Taking_Nutritional_Supplements__Reasons_for_Caution
[Clinical Problem] Constipation [Potentially Harmful Nutrient] Iron usually >17 mg/day [Reasons for Caution] 
Supplements of iron, especially high dose, can cause constipation as well as diarrhoea.
Minor Contraindications to Taking Nutritional Supplements
Reasons for Caution