The combined ingestion of protein and free leucine with carbohydrate increases post-exercise muscle protein synthesis in vivo in male subjects. - Koopman,R.; Wagenmakers,A.J.; Manders,R.J.; Zorenc,A.H.; Senden,J.M.; Gorselink,M.; Keizer,H.A.; van Loon,L.J. (Am J Physiol, 2004)