The presence of iron in ferric pyrophosphate, ferrous fumarate, and ferrous gluconate has been noted, with specific emphasis on the side effects associated with these compounds. In particular, ferrous fumarate at a dosage of 210 mg has been discussed in the context of its effectiveness and potential adverse reactions. Furthermore, the evaluation of medication effectiveness is crucial when considering the benefits of ferrous fumarate, especially in comparison to other iron supplements such as calcium citrate. The evaluation of medication effectiveness is not only important for assessing the efficacy of ferrous fumarate but also for understanding how it interacts with other supplements, including calcium citrate. Therefore, a thorough evaluation of medication effectiveness is essential to ensure that patients receive the best treatment options available.