Mercury Pharma offers ferrous fumarate and ferrous gluconate in a 600 mg dosage, while United Home provides ferrous sulfate. For those wondering how to take ferrous sulfate, it comes in a concentration of 300 mg per 5 ml. Additionally, Jamp offers ferrous fumarate as part of their range. It’s important to note that when considering iron supplements, one might also look into calcium citrate due to its potential benefits. Combining these supplements correctly can enhance overall health, and incorporating calcium citrate can be beneficial as well. Remember to consult with a healthcare provider before starting any new supplement regimen that includes ferrous fumarate, ferrous gluconate, or calcium citrate to ensure safety and effectiveness.