Question

we know that iron essential for our body but you know that we cannot eat iron so how do we get Iron for our body needs

Answer 1

Haemoglobin is rich in iron
So, we all eat the food which is rich in haemoglobin.

Answer 2

We do not eat iron, but we get it from our food just like we get other minerals and nutrients. We do not require 100 g of iron, so whatever we eat USUALLY, NOT ALWAYS provides us with sufficient quantity of iron.