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It's plausible that more copper peptide reaches systemic circulation via injection than topical application, but "reaches circulation" and "produces a proportionally larger effect" aren't the same claim, and GHK's short serum half-life complicates the simple version of this comparison considerably
doi: 10.1016/j.neuint.2019.04.006 190 EngidaworkEGulesserianTSeidlRCairnsNLubecG
Effects of Deficiency Lack of antioxidants and essential vitamins can lead to: Dull, uneven skin tone Weakened immune function Concerns It Can Help With Uneven skin tone Oxidative stress Collagen deficiency Weak immune function Detoxification needs Frequency of product usage Take one effervescent tablet daily or as directed by a healthcare provider
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