Thanks Sebastian Sitko for your participation in this topic.

I suggest that you read this paper, "Devries MC, Phillips SM. Supplemental protein in support of muscle mass and health: advantage whey. Journal of food science. 2015 Mar;80(S1):A8-15." It talks about the leucine threshold, which plays a pivotal role among BCAAs from different sources and diets.

https://www.researchgate.net/publication/273389724_Supplemental_Protein_in_Support_of_Muscle_Mass_and_Health_Advantage_Whey

Thanks Khashayar Maroufi , for sharing this article. I had read this article previously. This paper about whey protein supplement, and we know the whey protein supplement contains BCAA and other essential amino acids. In other words, BCAA is one of the components that exist in whey protein. I asked about BCAA supplements use lonely. In the review paper that I attached to the present topic, indicated that BCAA supplement alone could not increase muscle protein synthesis and explained for elevation in muscle protein synthesis needs to other essential amino acids. On the other hand, a recent review( Article Food-First Approach to Enhance the Regulation of Post-exerci...