protein synthesis protein intake. you can eat a pound of steak and only ~32% of those amino acids actually become new protein in your body. the rest gets converted to glucose Managing Competing Interests: Partitioning S between Glutathione and Protein Synthesis Plantae Transsulfuration Pathway an overview ScienceDirect Topics Understanding Homocysteine: All You Need To Know Mechanisms and rationales of SAM homeostasis: Trends in Biochemical Sciences