Believe it or not, consuming the toxins contained in whole foods makes us more robust.
This is similar to the phenomenon where children who grow up desperately poor and literally living in dirt have a markedly lower rate of autoimmune diseases than first world kids.
>= ~5 Sv in an acute dose is generally fatal, but a man named Albert Stevens was injected with a small dose of plutonium in a human radiation experiment, and suffered a net dose of 64 Sv over a 21 year period before dying of heart disease. [1]
"Whatever doesn't kill you makes you stronger" has _some_ truth to it. The body adapts and learns from various harmful things, hence it's less likely to affect you as strongly in the future.
This is similar to the phenomenon where children who grow up desperately poor and literally living in dirt have a markedly lower rate of autoimmune diseases than first world kids.