How was the the omega 6 / omega 3 ratio chosen?
"Several sources of information suggest that human beings evolved on a diet with a ratio of omega-6 to omega-3 essential fatty acids (EFA) of approximately 1 whereas in Western diets the ratio is 15/1-16.7/1. Western diets are deficient in omega-3 fatty acids, and have excessive amounts of omega-6 fatty acids compared with the diet on which human beings evolved and their genetic patterns were established. "
In other words, why not use an omega 6 / omega 3 ratio of 1 (if most of what we eat has too much omega 6 anyway)?