The absorption of ferrous bisglycinate is influenced by various iron supplements, including 45 mg of ferrous sulfate, ferrous fumarate, and a combination of ferrous fumarate with folic acid. Additionally, ferrous sulfate provides 65 mg of elemental iron. It is important to note that when taking supplements, one might consider using Citracal Calcium Citrate Petites, which are available in stores. These can help improve calcium intake without interfering with iron absorption. For optimal results, it is advisable to space out the intake of Citracal Calcium Citrate Petites and iron supplements. Incorporating these strategies can enhance overall nutrient absorption and support better health.