TIL that frequent blood donation has been shown to reduce the concentration of "forever chemicals" in the bloodstream by up to 1.1 ng/mL, and frequent plasma donors showed a reduction of 2.9 ng/mL.

https://jamanetwork.com/journals/jamanetworkopen/article-abstract/2790905
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1dddu9u/til_that_frequent_blood_donation_has_been_shown/