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Small cosmetic-formulation human studies Where GHK-Cu has been included in cosmetic formulations and tested in small human studies, photographic and instrumental endpoints (skin-density imaging, fine-line-depth measurements) are typically reported at 8 weeks, 12 weeks and 16 weeks
Laboratory rats were acclimated for five days and randomly assigned to their respective treatment groups
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Haskins AL (1967)
The cellular assays, including reactive oxygen species (ROS) assay (4 h-treatment), thiobarbituric acid reactive substances (TBARS) assay (6 h-treatment), glutathione (GSH) assay (6 h-treatment), and cell viability assay (12 h-treatment), were done as previously described [28] using a fluorescence spectrometer (VersaFluor, Bio-Rad Laboratories)
Females reported higher overall frequencies of poor appetite than males, whereas no significant sex differences were observed for insomnia, end-of-dose crash, or return of symptoms
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