Indian Breed Cows to Stop Drop in Milk Supply
Times of India (Bangalore Edition), Page 09
Monday, May 23, 2016
Know your Milk:
Should you be buying A1 or A2
Casein is the main protein in milk and makes up about 80 percent of the total protein.
A2 cows, that is, the native breeds of cows, produce this protein in their milk, along with an amino acid called Proline. Newer hybrid breeds, like the Jersey cow are A1 cows (including breeds like Holstein, Friesian and Ayrshire). In these breeds, the Proline amino acid gets converted to Histidine as a result of gene mutation over the years.
Now, here’s the main concern - in A2 cows, Proline bonds with another protein called BCM7 and prevents the latter from leaching into the milk. However A1 cows have Histidine, which doesn’t prevent the BCM7 from passing into our own GI tracts.
The NEWS Minute
Monday, April 17, 2017
A2 Milk offers hope for
Milk contains proteins called beta-caseins. Traditional cow's milk contains both A1 and A2 beta-caseins, but A2 milk contains just the A2 protein. The protein make-up of cows milk is genetic and naturally-occurring: In essence, different cows produce different variations, and the majority of cows are just bred to contain both beta-caseins.
In 2014, a peer-reviewed, "double blind", randomised human trial on A2 milk was conducted in Australia, where the A2 milk industry is burgeoning. From Perth's Curtin University, the study found that A1 milk gave people 61 per cent more bloating and 38 per cent more abdominal cramps than A2 milk.