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GHK-Cu has a science-heavy backstory, but interest usually comes down to visible outcomes
It works by inhibiting the proliferation of Cutibacterium acnes and modulating hyperkeratinizationboth key factors in acne pathophysiology
Skin hydration, wrinkling, and elasticity were assessed at baseline and after 12 weeks, with adjustments for temperature, humidity, and ultraviolet A light exposure (using weather data during the evaluation intervals)
Additionally, some individuals may experience gastrointestinal disturbances such as stomach cramps, nausea, or diarrhea
At the same time, vitamin C is known to support the epithelial barrier against pathogens
