In a 2015 journal article, Richie and his colleagues described that regular intake of glutathione significantly decreased oxidative stress, while natural killer cytotoxicity increased in participants given high doses of the substance
Lv M, Cai Y, Hou W, Peng K, Xu K, Lu C, et al
GHK-Cu Peptide Injection vs Topical (Quick Comparison) Before understanding the best way to take copper peptides, here's how GHK-Cu injection vs topical options perform on important factors: Benefits of GHK-Cu For Hair, Skin, and More If you're deciding between GHK-Cu topical or injection options, it's helpful to understand why this copper peptide has gained popularity for age management in the first place: Hair Growth and Scalp Support Research published in the journal Bioactive Materials suggests that GHK-Cu is potentially beneficial for hair and scalp health when applied topically
Before applying the cream to your face, patch-test it by putting a little on your inner arm or behind your ear