Amino acids like lysine, tryptophan, arginine, and glutamine, are essential building blocks for protein – vital for a healthy body. They’re great to take pre-workout or post-workout to kickstart muscle recovery and repair. Lots of athletes take BCAAs (branched-chain amino acids: leucine, isoleucine and valine) because they contribute towards increased muscle growth, reduced DOMS (delayed onset muscle soreness), less muscle wastage and reduced exercise fatigue to help you to recover faster so you can train with more vigor more often.