Xendurance protein is a proprietary protein sports blend of 18 amino acids containing whey protein isolate whey protein hydrolysate micellar casein and calcium caseinate this protein blend has been produced with cold process filtration that allows it to be in its most bio available and digestible form maximising absorption rate and utilisation of protein is key to muscle recovery which puts xendurance protein in a league of its own xendurance protein also contains 1500 mg of lactate the b