GHK-Cu in particular is sensitive to heat, oxygen, pH drift, and microbial contamination each of which can break the peptide bond, dissociate the copper ion, or otherwise inactivate the molecule before it reaches your scalp
The straightforward answer is no
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Clinical data from the European Journal of Clinical Nutrition shows NAC elevates intracellular glutathione by 3050% within two weeks, which is sufficient for most liver support protocols
No statistically significant difference was detected in the FVC nor self-sufficiency