The phd nutrition bccas is a fantastic branched chain amino acid supplement ideal for use during training providing your body with essential amino acidsr amino acids are the building blocks of protein these help protect muscles from being broken down and also help with protein synthesisr phd branched chain amino acids provide 3 essential amino acids leucine iso leucine and valine in a 211 ratio this is the optimal ratio that most amino acid products are atr the phd bccas can be used b