Whey protein is the protein part of whey the liquid that separates from milk during cheese production. Whey protein contains a unique amino acids profile that promotes the growth of muscle tissues promotes tissue repair after a strenuous workout sessions and helps to maintain immune and tissue health. Natures velvet nvpro 100 percent whey protein contains pure whey protein isolate (wpi) as the main ingredient. It provides glutamine and glutamic acid and naturally occurring branched chain amino acids (bcaas) leucine isoleucine and valine in each serving.