Firon III pyrophosphate is a compound often used in conjunction with ferrous gluconate, which can be purchased over the counter. This is effective in treating conditions like anemia, where ferrous sulfate and sodium ferric EDTA are also utilized. Additionally, calcium citrate plays a crucial role in enhancing iron absorption in the body. It is important to consider factors like histamine levels when using these supplements, as they can influence iron metabolism. Overall, the combination of calcium citrate, ferrous gluconate, and other iron compounds, alongside awareness of histamine, is essential for effectively managing anemia and ensuring optimal nutrient absorption.