My own version of junk science is looking at my family. One aunt smoked heavily for years - perfect health until she died in her late 80s. In spite of many family members being overweight or obese (except the aunt who smoked), my dad & I were the only ones to end up with t2 diabetes. There have been different cancers: lung cancer in an uncle who didn't smoke, breast cancer in one aunt, mom had liver cancer tho she never drank & a couple of others I can't recall.

I've pretty much decided that cancer is random. So I'll just do the best I can to stay reasonably healthy & hope for the best.