What is a common side effect of iron supplementation?

Iron supplementation is known to commonly cause constipation as a side effect. This occurs because iron supplements can reduce the motility of the gastrointestinal tract, leading to slower movement of stool and consequently, constipation. The body can react to the increased iron levels, particularly when there is a significant dosage increase or in individuals who may not have adjusted their dietary fiber intake accordingly.

While other side effects such as headaches, nausea, and fatigue can also occur, they are generally less common compared to constipation, making it a hallmark issue for those adjusting to iron supplements. This specificity helps in recognizing constipation as a frequent consequence when beginning iron therapy. Maintaining adequate hydration and fiber intake can often mitigate this particular side effect.