Are you aware of deuterium?
Discussion
are you aware of potassium-40?
This will fundamentally change my life now
yes, it will
all living things are adapted to surviving in its presence
https://www.youtube.com/watch?v=z9LgUlKNGFg
each tick is the sound of a radioactive particle emission hitting that detector's sensor
Our mitochondria are not adapted at handling accumulating amounts of deuterium however
there's always a tiny amount around tho, same as potassium, and the kidneys are gonna keep pushing that through unless you are poisoning synthetic amino acids with it or something to make it more persistent