glutathione by kath melendez HerSkin Nekothione & NekoCee : Health & Household Nekothione 9 in 1 Glutathione
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Gene expression: This is where GHK-Cu gets genuinely interesting

Pair this with a diet full of fruits and vegetables high in vitamins C and E, which synergize with GPx to combat oxidation

doi: 10.1016/j.sbi.2010.01.013

For optimal results, a series of treatments over several weeks is often recommended