Pasteurization is a process that is used to kill the bacteria in milk and make it safer to drink, while still maintaining the flavor. Milk is pasteurized by bringing it almost to a boil and the cooling it.
Ayurveda in its native place India has not picked up to the level it should have because ayurveda physicians have been allowed by Govt of India to practice allopathic medicine.
It's Chawanprash not Shavinprash. Chawaprash is a general tonic consists of more than 20 herbs, of which the main ingredients is amla
If the whites of your eyes are yellow it means you have jaundice. This could be due to a liver problem or medications you are taking. It needs checking by your doctor and a liver function test done.