ScienceDirect, Chandler, Rebecca E., et al
The mechanism was proposed to involve copper-dependent enzymes (notably lysyl oxidase, which catalyzes the cross-linking of collagen and elastin and requires copper as a cofactor), GHK-specific effects on growth factor activity, and downstream gene-expression effects in fibroblasts and other tissue-repair-relevant cell types
Tesamorelin is FDA-approved under the brand name Egrifta (approved 2010) for treatment of excess abdominal fat (lipodystrophy) in HIV-positive adults receiving antiretroviral therapy
Cycle-by-cycle math is in the supplies section above
From there, your cells use B12 to support energy metabolism, specifically by helping convert carbohydrates and fats into usable fuel
It has no approved indication, no standardized dosing, and no manufacturer-backed clinical data