> They also eat a lot (generally) more mushrooms and fermented food (and great variety of fermented food - not just yeast based stuff like yogurt).
Not that this detracts from the rest of your point at all, but yogurt is fermented by bacteria. There are milk drinks that are fermented by SCOBY though, like kefir.
Yogurt might be, but nearly all non-plain yogurt (in US supermarkets) is loaded with sugar. People eating such yogurt believing they're eating "healthy" are making a mistake.
