Ferrous forms of iron tend to be more bioavailable than ferric iron, meaning your body more easily absorbs them. However, some forms of iron, including ferrous sulfate, are more likely to cause ...

You can buy different types of iron supplements. The two main categories? Ferrous and ferric iron. (You can tell which one ...

For example, ferrous iron is better absorbed than ferric iron. Additionally, some iron supplements may cause constipation or other digestive issues. When choosing an iron supplement after gastric ...