Side Effects of Iron Supplements

Traditional iron supplements often come with adverse gastrointestinal (GI) reactions

Your iron supplement may be causing constipation, loss of appetite, stomach cramps, heartburn, diarrhea, discolored stools, and gas.

A man with glasses sits with a distressed expression, holding his head in his hand.

Up to 70% of people taking traditional iron report GI issues

Oral iron supplements break down in the stomach, which is why they can cause discomfort

Many people stop taking oral iron supplements because of side effects like:

  • Constipation 
  • Loss of appetite 
  • Stomach cramps 
  • Nausea
  • Heartburn
  • Diarrhea 
  • Discolored stools 
  • Gas

 


 

Did you know?

  • Oral iron is mainly absorbed in the small intestine. 90% of the iron in traditional iron supplements goes unabsorbed because it breaks down in the stomach before it reaches the intestine.
  • Unabsorbed iron can cause irritation and damage, contributing to GI discomfort.
  • Supplements are not evaluated by the Food and Drug Administration (FDA) and do not require backing by clinical studies.
A woman smiles wrapping a blanket around another woman, who holds a cup of coffee.

Try an Iron You’ll Actually Take

Unlike traditional supplements, ACCRUFeR® (ferric maltol) has a MALTOL SHIELDTM that keeps the iron protected from the stomach so it can be absorbed in the small intestine. This design minimizes the risk of unmanageable GI side effects.

Benefits of ACCRUFeR