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 Amazon.com: Pure Encapsulations L Methionine Glutathione and Amino Acid Supplement for Joints, Liver and Pancreas Support, Antioxidants, and Nervous System* 60 Capsules : Health & Household Hydrogen Sulfide: Modern Roles of an Ancient Signaling Molecule in Neuronal Function Burke Neurological Institute Weill Cornell Medicine Sulfur metabolism under stress: Oxidized glutathione inhibits methionine biosynthesis by destabilizing the enzyme cystathionine synthase Hacham 2025 Journal of Integrative Plant Biology Wiley Online Library Overview of Methionine Cycle and Folate Metabolism Creative Proteomics