Ами това не е мое мнение, а цитат от едно доста обширно проучване.
http://www.nap.edu/openbook/0309085373/html/215.html#pagetop
Masai, Alaska and Greenland natives, Inuits, Pampas indegenous people
There are no apparent effect on health or longevity.
The lower limit of dietary carbohydrate compatible with life apparently is zero, provided that adequate amounts of protein and fat are consumed