Injectable GHK-Cu is delivered systemically rather than absorbed through the skin, which produces different (and generally more pronounced) systemic effects than topical copper peptide cosmetics
One that says: This is here
Chronic exposure produces metabolic adaptations similar to those observed under caloric restriction, including reduced body weight and improved metabolic markers, without changes in caloric intake
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Given that FXS is a monogenic cause of ASD, these findings highlight both the challenges of translating GABAergic modulation into broad clinical efficacy and the importance of patient stratification in future trials of targeted therapies for neurodevelopmental disorders (152)
6 An enzyme called DPP-4 circulates in the blood and cleaves the peptide almost immediately after it is released, cutting between the second and third amino acids and rendering it biologically inactive