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They work at very low concentrations the effective doses were picomolar to nanomolar, suggesting that even modest topical application could deliver meaningful amounts to the follicle

For instance, animal studies have demonstrated that administering glutathione precursors leads to increased cell proliferation and improved recovery outcomes after hepatic injury
(1992) Effect of methylcobalamin (VB12) injection on sleep-wake rhythm in demented patients

Its a comprehensive approach rather than just dumping GHK-Cu into a bottle and calling it a day

In their case they calculated the average number of mutations per culture 'from the proportion of cultures containing no resistant bacteria at the moment of the test' in accordance with Poisson's law (Luria, Delbrck)
