Origin’s Guernsey a2 milk “is non-homogenized, low-heat vat pasteurized, with cream on top, and the cows are free-grazing and grass pastured,” claims founder and CEO Adrian Bota, who is also ...

First, the history. A gene change in cows took place some 10,000 years ago, about the time they were being domesticated. Originally, they all produced milk with an A2 protein, like humans and goats.