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In dermatology and skin care routines, GHK-Cu is often contrasted with retinol and retinoids because it may support skin and hair research with less irritation, although mild redness or irritation can still occur
Important patient-level data such as comorbidities, concurrent medications, and timing of symptom onset are often missing
Clinical data from major trials shows that continued use over 6 months produces cumulative weight loss of 1020% of baseline body weight in typical responders
Less flexibility in concentration
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