OstroVit Beef Protein 1800 g OstroVit Beef Protein is a high-quality biologically active supplement that is a source of protein in the form of hydrolyzed beef protein, as well as valuable amino acids L-glutamine and L-arginine. The drug is available in powder form with three delicious flavors and does not contain added sugar. This product is created both for athletes and for physically active people who want to supplement their diet with valuable ingredients, both when building muscle mass and reducing fat tissue.