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Monday, January 23, 2017

A1 Versus A2 Milk - Does it Matter?

Milk is a great source of Calcium and Protein

Casein is the largest group of proteins found in milk which makes up about 80% of the total protein content. 

A2 cows are the earlier breeds of cows like the desi Indian cows or the African cows that produce this protein in their milk along with an amino acid called Proline.




 In the new hybrid breeds, the proline amino acid got converted to Histidine due to alteration of genes over the years. These are the A1 cows that include breeds like Holstein, Friesian and Ayrshire.

Proline is strongly bonded to a small protein called BCM 7, which prevents it from getting into the milk produced by A2 cows. On the other hand, Histidine holds a weak bond with BCM 7, so it is easily released in the GI tract of animals and can enter the human body on consumption of milk from A1 cows and interact with the digestive system and internal organs.

Why is it Harmful?



A group of Russian researchers have shown that BCM 7 does pass into the blood of babies who were fed infant formula which led to delayed psycho-motor (brain-to-muscle) development (as published in the International Journal ‘Peptides’).

 Another report, published in the Indian Journal of Endocrinology and  Metabolism in 2012, indicates that it is associated as a risk factor for Type 1 Diabetes, Coronary Heart Disease and Mental disorders like autism and schizophrenia because it may enter your brain through blood.

A human clinical trial conducted at Curtin University in Australia did prove that there were significant differences in digestive symptoms between milks containing A1 and A2 beta-casein. It has been approved that certain unwanted proteins or peptides that do not naturally occur in the human body may cause digestive disorders like irritable Bowel Syndrome or a weak gut.

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