Is Unabsorbed Iron Bad?

The unabsorbed iron becomes oxidised and causes gut irritation, resulting in side effects such as constipation and nausea.

What does unabsorbed iron mean?

This is a result of poor absorption. The unabsorbed iron becomes oxidised and causes gut irritation, resulting in side effects such as constipation and nausea.

Can iron supplements be harmful?

Can iron be harmful? Yes, iron can be harmful if you get too much. In healthy people, taking high doses of iron supplements (especially on an empty stomach) can cause an upset stomach, constipation, nausea, abdominal pain, vomiting, and fainting. High doses of iron can also decrease zinc absorption.