Why did we design bcaa 411 branched chain amino acids bcaas make up 35 of lean muscle mass this makes them an essential element to anyones diet but particularly for those who are training to build lean muscle mass although bccas are present in foods such as fish chicken and steak to get the same optimum dosage as bcaa 411 you would have to consume large quantities which would not only be extremely costly but could also compromise your body composition how did we design bcaa 41