European Journal of Clinical Nutrition, [online] 72(1), pp.105111.
Third, systematic replacement of flexible ether linkages and metabolically vulnerable substituents with bicyclic and conformationally constrained motifs produced substantial improvements in physicochemical and ADME parameters, including increased solubility, enhanced microsomal stability, reduced CYP inhibition, and lower P-gp liability, while maintaining sub-nanomolar to picomolar potency (Layton et al., 2023)
Ruggenenti, P., Cattaneo, D., Loriga, G., Ledda, F., Motterlini, N., Gherardi, G., Orisio, S., and Remuzzi, G
This prevents the glutathione from being used up too quickly
Your pituitary stays active, and you're less likely to experience the feedback loop issues that can happen with direct HGH replacement
For instance, a study in the Journal of Dermatological Treatment found that oral glutathione for skin may help lighten skin after a few weeks