Syrup containing ferrous fumarate, gentle iron in the form of ferrous bisglycinate, and ferrous gluconate can sometimes lead to heartburn. Additionally, ferrous sulfate, including its variants such as ferrous sulfate fumarate and gluconate, provides elemental iron. It’s important to note that calcium citrate malate is also essential for maintaining overall health. GSK emphasizes the significance of combining these elements effectively in dietary supplements. For individuals seeking to manage their iron levels, the integration of calcium citrate malate with iron supplements can be beneficial, as GSK recommends ensuring adequate mineral intake. Therefore, when choosing iron supplements, consider options that include both ferrous compounds and calcium citrate malate for optimal health benefits.