BCAAs are essential amino acids, obtained from high protein sources. Gifted Nutrition BCAAs have a superior ration of 4:1:1 for athletes and fitness enthusiast of leucine, isoleucine and valine. Leucine has been shown to play a key role in building muscle (protein synthesis) resulting in increased muscle developments with exercise and reduced muscle damage. BCAAs are great pre-, Intra, and post- workout to maximize lean muscle growth and support muscle recovery and repair. L-Glutamine, which is one of the most abundant amino acids in the body, is important for muscle recovery and growth. Glutamine also supports immunity and post workout muscle fiber repair to keep you training and results on track.