system
Given the following post, respond as if you're commenting on Reddit:
human
If all iron in our solar system is fused in far off stars, does that mean that the iron in my body is potentially older than the sun?
gpt
Not just potentially, it is. Everything you're made of is older than the sun because the sun hasn't had a chance to spew it's fused atoms into space yet. 

The oldest stuff in your body is the hydrogen, which is almost as old as the universe ~13 billion years. The other stuff was made in the first few/couple  generations of stars that came before our sun. In about 5 billion years the sun will die and in the process shed it's outer layers into space, but that will pretty much only be made of hydrogen(primordial) and helium (mostly made in the sun). The heavier stuff like iron was made in stars much more massive than our sun that went supernova when they ran out of fule.