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This data helps clinicians adjust dosages, detect potential side effects, and ensure the patients overall health is improving
Safi C, Zebib B, Merah O, Pontalier PY, Vaca-Garcia C
A double-blind study found dark spots improved with glutathione + cystine by 77% in 12 weeks, but these benefits faded after supplementation ended (NIH)
Nervous System Damage: Excessive use of glutathione IV Therapy causes toxic effects on the nervous system
New England Journal of Medicine, Dec
The reason is partly regulatory: under UK law (specifically the Human Medicines Regulations 2012), peptides marketed for cosmetic or therapeutic use in humans require MHRA authorization, which GHK-Cu currently lacks
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