Actually, this is not strictly true because there are two relatively small other drains of mass in the methionine cycle, the polyamine drain from SAM and the thiolactone drain from Hcy
PMC5217336 Casarini L et al
A panel is meeting this week to weigh the future of several popular peptides including trendy compounds prized for injury recovery, fat loss, and sleep that the FDA has banned
PLoS One 11 (2), e0147737
3.Harvesting of Lentivirus (1) After transfection for 24 h, discard the initial viral supernatant, add 10-15 mL of fresh complete medium (including serum), and continue incubating for further culture
IV Vitamin C Therapy: Targeted Vitamin C infusions for patients seeking immune protection and collagen support in Ashburn, VA, and Bethesda, MD