As I continue to search for adequate protein sources for optimum heath and exercise recovery, being as though I have been an ovo lacto vegetarian for the last 30 plus years of my life. I have found a protein that helps with repair, recovery and proper immune function. Whey is the liquid material and globular proteins that is the by product of cheese production from milk. I was a bit hesitant with this because of my history with lactose and milk digestion intolerance. But with my current athletic program it has worked well and because of the lack of casein in this product, my digestion has been stable with the major allergen source in milk being from caseins.