Ferric pyrophosphate has the identification number 210, while ferrous fumarate and ferrous sulfate are often compared to iron gluconate. Nature’s Bounty produces ferrous sulfate, which is available alongside iron gluconate in a 325 mg dosage. Additionally, you can find products like Amazon Citracal Petites, which are popular among those seeking dietary supplements. It’s essential to explore the various iron supplements, including ferrous fumarate and iron gluconate, to determine which one best meets your nutritional needs. Many individuals prefer Amazon Citracal Petites for their convenience and effectiveness in supporting calcium intake.