Cystine has better solubility in acidic and alkaline solutions but is relatively unstable, easily reduced back to two cysteine molecules in a reductive environment
Cazzolla A, Mondala JRM, Wanigasekara J, Carroll J, Daly N, Tiwari B, et al
Paradigm Peptides faced federal charges
doi: 10.1186/s13229-021-00447-5 151 Zuiderwijk-SickE
Cancer cachexia--pathophysiology and management
"The growth hormone/IGF-1 axis is an attractive target for preserving muscle mass in cirrhosis, but the liver's dual role as both a GH effector organ and a metabolic clearance site means that any GH-axis intervention must account for the degree of hepatocellular dysfunction," according to the Endocrine Society's position statement on GH in chronic illness (Endocrine Society Clinical Practice Guideline, 2011)