The initial publication discusses a tablet containing ferric pyrophosphate combined with glycine, detailing its components such as ferrous sulfate at a dosage of 325 mg, as well as the interactions of ferrous gluconate. Additionally, it mentions ferrous fumarate, specifying one formulation at 210 mg. It’s important to highlight the role of calcium citrate 667 mg in this context, as it can be relevant in various dietary supplements. The inclusion of calcium citrate 667 mg is noteworthy, as it appears three times in the discussion regarding its interaction with iron-based compounds like ferrous sulfate and ferrous fumarate. Thus, the interplay of these elements is crucial for understanding their combined effects in nutritional formulations.