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Both methods bypass the digestive system, but they differ in absorption speed, nutrient scope, and ideal use cases
Chemical penetration enhancers including propylene glycol, dimethyl sulfoxide (DMSO), and various terpenes increase GHK-Cu skin penetration by 2-4 fold, though potential irritation risks require careful optimization
Immune System Modulation: By protecting lymphocytes (white blood cells) from oxidative stress, glutathione ensures that the immune system remains primed and ready to respond to pathogens
Neurobiol Learn Memory (2021) 182:107463
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