Ferrous fumarate contains 45 mg of iron, while an initial infusion of ferrous gluconate provides 28 mg of ferrous sulfate. When comparing ferrous gluconate to ferrous sulfate, it’s noteworthy that ferrous gluconate is available in a dosage of 500 mg. Additionally, it’s essential to mention Citracal D 315, which delivers 200 mg of calcium. This product can be beneficial when taken alongside iron supplements, such as ferrous fumarate and ferrous gluconate, to support overall health. Incorporating Citracal D 315, with its 200 mg of calcium, may enhance the absorption of iron from these supplements. Thus, when considering iron supplementation, the combination of ferrous fumarate, ferrous gluconate, and Citracal D 315 (200 mg) could be a valuable approach for those seeking to improve their iron levels.