What Has Not Been Established It has not been proven universally superior to reduced glutathione
You have three administration options: Option A: Injectable GHK-Cu only 200 to 600 mcg per day, subcutaneous Best for systemic tissue support (skin, joints, hair, internal tissues) No fasting required Option B: Topical GHK-Cu only Applied to target areas once or twice daily Best for localized skin concerns (face, abdomen, specific areas of laxity) Lower cost, no injection required Option C: Injectable plus topical (recommended for maximum benefit) Injectable for systemic support plus topical for targeted skin areas Most thorough approach Addresses both internal tissue health and external skin quality Step 4: Improve and Maintain As semaglutide is titrated up over the following months, continue GHK-Cu consistently
Further, as hair loss occurs and the scalp loses its natural protection against sunburn, photodamage to the skin may accelerate the rate of damage to remaining hair follicles [15, 16, 17]
Further, as Healthline points out, injectable B12 which is generally given in much higher dosages than what can be found in food and multivitamins has been associated with more commonplace side effects, minor as they may be
Low levels of glutathione can increase the risk of diseases like cancer and diabetes