Zinc gluconate 2201, along with ferrous sulfate 240 mg, ferrous gluconate, and ferric pyrophosphate, provides elemental iron in various forms. Additionally, it’s important to understand the difference between calcium carbonate and calcium citrate, especially when considering supplementation. While both forms serve as calcium sources, they differ in absorption rates and how they interact with stomach acid. This distinction is essential for choosing the right calcium supplement based on individual needs. When discussing iron supplements like ferro-60, one may also need to compare their efficacy with calcium supplements, taking into account the difference between calcium carbonate and calcium citrate to ensure optimal nutrient absorption.