Phd bcaa from phd supplements does exactly what it says on the tin and in the manufacturers label information listed below phd bcaa is hugely rich in branched chain amino acids bcaa amino acids that are vital to the human diet when taken in the carefully formulated doses that phd bcaa boasts these phd supplements work to stimulate muscle synthesis muscle recovery and general sustainability of results weve been fans of phd bcaa for a long time now and our team of specialists at our sup