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The mechanism targets tissue repair rather than acid suppression, so it addresses a different part of the healing pathway

Research-grade GHK-Cu is often more expensive due to the rigorous synthesis processes, higher purity standards, and extensive analytical testing required

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With increased sample size, this work can be the catalysis toward prompting personalized instructions and specifications for improved use of topical sprays

A meta-analysis and systematic review

So the two come from separate chemical families, and asking whether NAD is a peptide is a bit like asking whether a battery is a text message