Firsiron bisglycinate, also known as pubferrous bisglycinate, along with ferrous fumarate, ferrous sulfate, and zinc ferro fe 90, is often used in iron supplementation. Additionally, ferric gluconate complex is another option available. It’s important to consider the appropriate calcium citrate doses when incorporating these supplements into your routine. Ensuring you have the right calcium citrate doses can enhance the absorption of iron and improve overall health. Therefore, when you choose iron supplements like ferrous fumarate or bisglycinate, remember to monitor your calcium citrate doses for optimal results.