That's probably it. But what did your grandfather drink instead of water?
Discussion
Milk, coffee and tons of soda of any kind.
Man that's messing with me too now
It's like the 100 year old that smoked every day. Outliers exist in a small fraction. It might not be wise betting on being an outlier though.
I dunno man, sometimes I feel like some people are just too lucky with their genes or whatever it may be. If I followed his diet I'd probably be dead by now.
I think it's true to some extent. Some people are just really robust, or are eating something so good that it outweighs the bad.