does glutathione inhibit melanin for skin lightening: a regnant myth or evidence-based verity? Glutathione Skin Whitening: Evidence &

Laboratory and clinical research indicate that GHK-Cu may stimulate Type I and Type III collagen production in dermal fibroblasts, with the strongest evidence from topical applications [2]

The compound also inhibits inflammatory mediators such as IL-6 and prostaglandins that drive post-inflammatory hyperpigmentation

All animal experiments were conducted in accordance with the Guide to Academic Integrity and Research Ethics issued by the Supreme Council of Universities (SCU), Egypt, the institutional guidelines and regulations for the care and use of experimental animals, and the relevant national ethical standards

While some users report positive outcomes, others have found the peptide to have little or no effect on their sleep, anxiety, or stress levels