In laboratory settings, GHK-Cu may be used to investigate: All uses are limited to research settings only
Vials shaken for 10 seconds showed 3.2-fold higher aggregate formation compared to vials swirled gently
Diabetes Obes Metab 17:414422 Habegger KM, Heppner KM, Geary N, Bartness TJ, DiMarchi R, Tschop MH (2010) The metabolic actions of glucagon revisited

Tesamorelin makes more sense if: Your main goal is losing stubborn belly fat or body recomposition You're already exercising and eating well but can't move the needle on your midsection You want the strongest clinical evidence behind your protocol You're comfortable managing more noticeable side effects in exchange for more aggressive results You want faster, more visible changes in body composition Sermorelin makes more sense if: You're seeking broad GH optimization across multiple areas (sleep, recovery, skin/hair, energy, body comp) You're new to peptide therapy and want a gentler introduction You're a woman (estrogen amplifies the IGF-1 response, making the lower intensity more than sufficient) You prioritize minimal disruption and a mild side effect profile Your goals are more about sustained vitality and anti-aging than aggressive fat targeting You want a simple daily protocol without cycling on and off The honest answer for most people If you have one specific, measurable goal losing visceral fat and the clinical data supporting that outcome matters to you, tesamorelin is the more targeted tool

Most patients notice reduced appetite within the first few days, with visible weight loss starting in a few weeks