The BCAA's (Branched Chain Amino Acids) are 3 essential amino acids that have a branch in their chemical structure. They are considered 'essential' because the body does not produce them and they must be consumed in the diet. They are also widely considered to be the most anabolic of the essential amino acids and have an abundance of research showing that they promote recovery, muscle maintenance and growth. The most important of the BCAA's for signaling protein synthesis is L-Leucine. Delivers the most anabolic essential amino acid to the body over time to prolong the signaling of protein synthesis. This is for anyone that is tired of a shaker cup full of foam every time they mix their BCAA's. However the importance of water soluble amino acids extends beyond that. Contained within that bothersome foam is the majority of your Leucine, the most important of the BCAA's for anabolic signaling. If you don't consume the foam, you're simply wasting your hard earned money. What good is a high Leucine BCAA product if you do not consume adequate quantities of Leucine?