FUSION PROTEIN by Weider - Fusion Protein has been developed from 4 quality protein sources, offering all the benefits of animal and vegetable proteins in a single product. These four sources are : Whey concentrate, whey isolate, soya protein isolate and yellow pea concentrate. Thanks to this combination of proteins, we have obtained a protein with an optimal amino acid profile, low in fat and sugars. In this way, we've designed a protein that will help you both in the muscle mass gain and definition phases. Fusion protein provides up to 4.3g of branched-chain amino acids (BCAAs) and 22g of protein per shake. BCAAs are essential amino acids that play a fundamental role in muscle development and recovery.