Fifi Lamoura@RadicalAnthro Firefighters in Australia figured out that donating blood helps reduce the levels of PFAS in the blood (the donated blood is replaced by fresh blood the body creates). A fire chief noticed the connection due to blood donors on his crew having less cancer and then teamed up with scientists to prove it. A truly spectacular bit of observational science from a citizen scientist. Perhaps women considering getting pregnant should consider donating blood regularly? (I would if I wasn't barred from donating blood due to having lived in the UK in the 80s.)
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