Forgive me if I got the wrong board for this but need help with a biology question

No.13910445 ViewReplyOriginalReport
What’s the strongest material the human body can produce? I thought it might be iron cause it’s in your bloodstream but figured I might aswell ask the experts…

Not sure if this is the correct board for medical/biological questions so if I’m in the wrong place feel free to redirect me to the correct board…