F8 mg iron supplements, particularly ferrous sulfate, are commonly used during pregnancy. When comparing iron glycinate to ferrous sulfate, there are notable differences in absorption and side effects. The use of ferrous sulfate is often recommended for its effectiveness, but some individuals may benefit more from iron glycinate due to its gentler impact on the digestive system. Additionally, it is essential to consider calcium citrate USP monograph guidelines when discussing iron supplementation, as calcium can affect iron absorption. Therefore, understanding the interactions between these supplements is crucial for pregnant individuals seeking optimal health. When considering ferrous sulfate versus iron glycinate, one must also keep in mind the recommendations from the calcium citrate USP monograph, which may influence the choice of iron supplements taken during pregnancy.