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Glycemic effects remain relevant, particularly in patients with prediabetes or insulin resistance, but they are no longer the defining measure of success
tirzepatide suppresses appetite through GLP-1/GIP receptor activation
Tripeptides such as GHK-Cu have an established safety record in topical and cosmetic applications, showing low cytotoxicity and reduced skin irritation compared with other copper compounds, and acceptable tolerability in clinical cosmetic studies [23, 74, 93]
Applied consistently, these habits are what make GHK-Cu research interpretable and repeatable rather than anecdotal
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