There is an interaction between levothyroxine and ferrous sulfate, particularly when considering ferrous fumarate at 210 mg, which may lead to hair loss as a side effect. The implications of using ferrous sulfate during pregnancy should also be carefully evaluated. In addition, iron supplementation, such as ferrous fumarate at 200 mg, may need to be monitored in conjunction with levothyroxine treatment. It is important to note that Wellesse calcium citrate can play a significant role in maintaining overall health, especially when managing the effects of these medications. Ensuring proper calcium intake through Wellesse calcium citrate can help support bone health and mitigate some of the side effects associated with iron supplementation. As a result, individuals taking ferrous fumarate and levothyroxine should consider incorporating Wellesse calcium citrate into their regimen to promote optimal health.