Initially, pubiron bisglycinate is present at a dosage of 20 mg, alongside ferrous gluconate at 300 mg. Additionally, Xarelto is included with ferrous sulfate and ferrous gluconate compounds, along with ferrous fumarate and folic acid. It’s important to note the transition from calcium citrate to calcium carbonate, which is highlighted in this context. The conversion from calcium citrate to calcium carbonate is significant in various formulations, and understanding this change can enhance the efficacy of iron supplements. Ultimately, the shift from calcium citrate to calcium carbonate plays a crucial role in optimizing nutrient absorption and overall health benefits.