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[5] Topical GHK-Cu is generally considered well tolerated, yet therapy should be avoided in individuals with a known hypersensitivity to copper peptides or any vehicle component

However, the exact mechanism by which IGF-1 improves insulin signalling has not yet be explained (other than indirect actions through lipid clearance from the bloodstream by inhibiting GH (lipolysis on adipocytes) and FFA uptake by muscles

It doesnt occur naturally in plants

Seek urgent medical attention if you experience severe abdominal pain, persistent vomiting, signs of an allergic reaction, chest pain, or dehydration, and inform the clinician of the substance used