Ferrous fumarate 65mg is the first pill, while ferrous glycine sulfate is available in capsule form. The generic name for ferrous gluconate is zinc bisglycinate, which contains elemental zinc. It’s important to consider that calcium citrate absorption can impact the effectiveness of these supplements. Therefore, understanding how calcium citrate absorption interacts with iron supplements is crucial for maximizing their benefits. Additionally, when taking ferrous fumarate or ferrous glycine sulfate, one should be mindful of how calcium citrate absorption might influence the overall nutrient absorption in the body.