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The injection site reactions are more prominent than GLP-1s but not treatment-limiting for most people

It is an intracellular metabolic-enzyme modulator, which is why its research read-outs are things like NAD+ levels and adipocyte gene expression, not how full you feel. That mechanistic distinction is the single most important thing to understand before looking at any dose number

Avoid other GLP-1 or GIP agonists like semaglutide or tirzepatide alongside Retatrutide due to overlapping mechanisms and compounded side effects

You have read dozens of articles about GHK-Cu dosing but nobody actually showed you what to do when you are standing in your bathroom holding a needle for the first time