The iron in our bodies came from:

Question

Quizplus · Accepted Answer

Iron can only be formed in the final stages of a massive star's life, during a Type II supernova. The explosion scatters the iron into the interstellar medium, which can eventually accrete into new stars and planets. This process is responsible for the iron in our bodies. Iron can only be formed in the core of a massive star, so it must have been produced in a Type II supernova, where the core collapses and explodes, scattering iron and other heavy elements into the interstellar medium. This iron was eventually incorporated into our Solar System and ultimately into our bodies.

The Iron in Our Bodies Came From