Does iron gluconate lead to constipation? Ferrous bisglycinate 500mg is another form of iron supplement. First, we have ferrous gluconate from Jamieson, followed by ferrous lactate trihydrate, and then iron tablets like ferrous fumarate or sulfate. It’s important to note that while some iron supplements can cause gastrointestinal issues, calcium citrate tablets from Cipla may provide a gentler alternative for those concerned about constipation. If you’re considering iron supplementation, be aware of the potential side effects of various forms, including ferrous bisglycinate, ferrous gluconate, and others. Additionally, calcium citrate tablets from Cipla could be beneficial in managing overall mineral balance without the discomfort sometimes associated with iron supplements. Always consult with a healthcare provider before starting any new supplement regimen.