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Ishii, M

While they share some core similarities, key differences in their structure, effect, and safety set them apart

Aids in converting fats into energy, preventing their accumulation in muscles

The copper ion itself serves as a cofactor for lysyl oxidase, the enzyme responsible for collagen and elastin cross-linking, meaning GHK-Cu both stimulates production of new structural proteins and ensures they are properly stabilized

On the other hand, the glutathione injection is given in the muscle mass, which is released gradually over time, depressing its effects

As a long-acting analog of GHRH, its benefits can be achieved with fewer injections, ideal for those who prefer injections once or twice per week, along with a consistent fat-burning effect