Desi cow breeds or Gir cows generate the majority of A2 cow milk in India. The presence of the A2 protein in milk of Indigenous/Indian Breed cows (e.g., Gir cows / Rathi cows) distinguishes it from milk from other breeds. The distinction between A2 milk and A1 milk is not merely a matter of naming but there different chemical constituents of the milk due to different cow breeds. The milk from other breeds contains A1 protein, which is found in hybrid or cross breeds and lacks most nutrients found in A2 milk. Jersey cows and other crossbred cows produce A1 milk, which comes from cows of European heritage. There is a significant variation in how our bodies digest the two.