Ferrous fumarate is a mild form of iron supplement. It is often compared to ferrous gluconate and ferrous sulfate, with the latter typically available in a dosage of 325 mg. Many people wonder about the safety of iron fumarate, particularly in relation to its side effects. Additionally, there is a common concern about whether calcium citrate causes constipation, as this can affect individuals taking iron supplements. When considering iron fumarate and other iron forms like ferrous gluconate and ferrous sulfate, it’s essential to be aware of how they interact with dietary elements, including calcium. This leads to the question: does calcium citrate cause constipation, and how does it impact the absorption of iron supplements like ferrous fumarate? Understanding these interactions can help individuals make informed decisions about their supplementation and overall digestive health.