If some populations have evolved some kind of adaptation to cow's milk, it is to be expected that similar arrangements occurred to a certain extent with cereals.
While reading the above article , it came to my mind that what science is aiming at, is to find ways to get everyone more adapted to cereals, or at least as adapted as the most adapted amongst us.
The guy who will find a pill to increase the amylase content of our saliva, so that everyone will run less risk of becoming obese, will become a wealthy man.
When this will happen, people will be encouraged to seek treatment to improve their "adaptative factor" to cereals.
And those with the lowest level of amylase in their saliva will find it normal to follow a special medical treatment to cope with their "handicap" ..........