GHK-Cu vs Adjacent Categories Format Topical GHK-Cu (cosmetic) What it is Copper Tripeptide-1 in serums and creams Evidence base Strongest human evidence (Leyden 2002, NEEL 2023) Typical use Daily anti-aging skincare Format Injectable GHK-Cu (research-use) What it is Reconstituted vial, SubQ injection Evidence base Mostly preclinical
Additionally, it contributes to the innate immune system, the bodys first line of defence, by activating immune cells to respond quickly to infections
GLP-1
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Exercise improves insulin sensitivity, which tirzepatide also targets, and helps maintain the metabolically active lean mass that influences thyroid hormone requirements
Steroids can reduce tirzepatide's effectiveness by raising blood glucose and increasing appetite through different metabolic pathways