Ferrous bisglycinate chelate at a dosage of 28 mg is known for its high solubility in water. This enhances its absorption in the body, making it a preferred choice for iron supplementation. Ferrous fumarate, on the other hand, is commonly used to treat iron deficiency anemia. Another option for iron supplementation is ferrous glycine sulfate capsules, which are typically available in 100 mg doses for oral consumption. Additionally, ferrous bisglycinate in a 50 mg formulation is also an effective choice. It is important to note that when considering iron supplements, individuals with calcium citrate in their diet should be mindful of how it affects kidney function. Overall, ferrous bisglycinate, along with ferrous fumarate and ferrous glycine sulfate, presents various options for those seeking to improve their iron levels, especially when considering their interactions with calcium citrate and kidney health.