Ferrous bisglycinate is often utilized due to its enhanced absorption properties. The sodium salt of EDTA is commonly used for its ability to chelate minerals and improve bioavailability. Ferrous fumarate, containing 210 mg of iron, is another form of iron supplement. In terms of efficacy, ferrous sulfate is classified similarly to glycine. Additionally, incorporating calcium citrate malate and vitamin D3 into the diet can further support mineral absorption and overall health. It is essential to consider the benefits of calcium citrate malate and vitamin D3 when choosing iron supplements, as their presence may enhance the effectiveness of ferrous bisglycinate and other iron compounds.