Why Iron Supplements Sometimes Cause Constipation in Kids, and What to Do About It ConstipationGut IssuesNutrient DeficienciesStomach ProblemsVitamins & Minerals Why Iron Supplements Sometimes Cause Constipation in Kids, and What to Do About It Constipation, nausea, stomach discomfort, and other digestive symptoms are common reasons families struggle to continue…Dr. Green MomAugust 1, 2026