The most common side effects from GHK-Cu include redness, itching, or irritation, but those should be transient or go away with continued use
If the liver produces enough glutathione, it can exit acetaldehyde (alcohol turned into toxic acid in the liver) quickly from the body
10.1016/j.mayocp.2018.09.013 42 SpalingerM
As a potent antioxidant, it helps to combat oxidative stress and environmental aggressors that can lead to dullness and discoloration
It should be kept away from heat, sunlight, and contamination
Intravenous Glutathione IV glutathione carries additional risks beyond oral supplementation [60]: Skin rashes Abdominal pain Thyroid dysfunction Liver dysfunction Kidney dysfunction and possible kidney failure Stevens-Johnson syndrome (rare) These risks have been documented particularly in the context of IV glutathione used for cosmetic skin lightening, where it may be administered repeatedly at high doses (600-2,400 mg per session) [60]