glutathione 101 part 1 cysteine misbehaves but glutathione saves l-Cysteine-Glutathione Mixed Disulfide, a Novel Bioavailable Sulfhydryl-Modified Precursor, Protects against Early Liver Injury Induced by Short-Term Hypercholesterolemia Frontiers | Exogenous cystine increases

Well-structured treatments lasting 6-12 months with appropriate concentrations typically maintain noticeable improvements over pre-treatment baseline including reduced fine lines (though not eliminated as during peak treatment), improved skin texture and firmness (though less dramatic than treatment peak), better overall skin quality and appearance (though aging continues at normal rates), and resolved specific issues like scarring or hyperpigmentation (which typically remain improved permanently if successfully treated)

Noctor, G

Food builds the foundation, and supplementation fills the gap

Phase 2b doses were 0.25 to 1.0 mg daily, which at a 2.5 mg/ml concentration means 0.1 to 0.4 ml per injection, conveniently measurable on a 1 ml insulin syringe