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GHK-Cu (copper tripeptide-1) is a cosmetic ingredient and is not approved by the FDA, EMA, or any comparable regulator for the treatment, cure, or prevention of androgenetic alopecia, telogen effluvium, or any other hair-loss condition

I read on the archives here that glutathione half life is 30 minutes

Common side effects: Injection site discomfort Mild diarrhea Hot flashes Dizziness or itching Precautions: Avoid B12 injections if youre allergic to cobalt or have Lebers hereditary optic neuropathy

Standardized Dosing : Each capsule contains precisely 500mg of reduced glutathione, formulated to deliver consistent bioactive levels within the optimal 500-1,000mg supplementation range