Branched Chain Amino Acids (BCAAs) are essential amino acids and are pretty much the building blocks to protein. Muscles are reliant on BCAAs because proteins are bonded together by BCAAs and are the fuel that keeps the skeletal muscle going.
There are 22 amino acids in the body and they are essential because the body doesn't product them on their own. BCAAs are the essential amino acids leucine, isoleucine and valine.That's why it's so important to supplement BCAAs if you want serious muscle growth or to keep muscle size when dieting.
BCAAs can be taken pre, intra or post workout. and for optimal results use BCAAs with a balanced diet and workout routine.