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Proc Natl Acad Sci 85(21):82618265 Talalay P, Fahey JW, Holtzclaw WD, Prestera T, Zhang Y (1995) Chemoprotection against cancer by phase 2 enzyme induction

Hormone signaling Local estrogen production may play a pathophysiological role in endometriosis by enhancing the inflammatory status of the endometrium [81]

: By clearing toxins and heavy metals, glutathione may unclog follicles, allowing better nutrient absorption and potentially promoting new hair growth

Even a recent 2026 review concludes the same thing that GHK-Cu appears safe but the evidence is largely preclinical and comprehensive human RCTs are lacking (Wojcieszuk et al., 2026)