Research shows that skin loses up to 30% of its collagen in the first five years after menopause roughly 2% per year, starting as early as perimenopause
C., Galluzzi, L., & Vanpouille-Box, C
Zeng Z, Shi Y, Tsao T, Qiu Y, Kornblau SM, Baggerly K, Liu W, Liu Y, Rommel C, Fruman DA, Andreeff, Konopleva M
How research grade DSIP spray is characterized The tryptophan is useful here for the same reason it is in Thymogen: it absorbs at 280 nm and is natively fluorescent, so this peptide can be detected with better specificity than the aromatic-free short peptides that must be read at 214 nm
If you've taken standard oral glutathione consistently without noticing any change, a liposomal version is a reasonable next option to try