Ferrous gluconate is available at Kroger, while ferrous fumarate in liquid form is also offered by BNFST. When comparing ferrous gluconate and ferrous sulfate, both provide elemental iron, but their compositions differ. Additionally, Bliswampole supplies ferrous fumarate iron, and ferrous pyrophosphate is another source of elemental iron. It’s important to note that in discussions about iron supplementation, the inclusion of 300 mg calcium citrate can enhance absorption and efficacy. For those considering iron supplements, options like ferrous gluconate, ferrous fumarate, and ferrous sulfate can be evaluated alongside the benefits of incorporating 300 mg calcium citrate into the regimen. Ultimately, the choice of iron supplement may depend on individual needs and preferences, but ensuring adequate calcium citrate intake—specifically 300 mg—can play a crucial role in supporting overall health.