It does seem that humans are really sturdy, and it's all the bad stuff combined in the last few decades that just does us in. it's hard to not consume up to the limit of what we can tolerate.

My great aunt at 98 still drinks a glass of wine before bed. I would sleep horribly if I did that. if i had a squeaky clean diet, i could probably go back to it.

she also ate a donut for breakfast and sausage & eggs (not saying this is bad).