Could not believe my eyes when I saw A2 milk on the shelf at Whole Foods today for the first time. For the past 8 years I have drunk goat milk, which has A2 protein and tastes good but costs twice what cow's milk costs.
I had first tried A2 milk last winter break in Cold Storage supermarket in Singapore--in long-life box form--but did not expect to see it in the US for another 5 or 10 years.
A1 protein causes allergies and phlegm and is linked to indigestion and autism. A2 has none of the side effects (although if you are lactose intolerant it does have lactose).