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This dual action, chemical protection through antioxidants and physical protection through structural support, explains much of GHK-Cu's effectiveness for anti-aging applications including hair
Nature (2012) 483:3504
Pregnant or nursing women
Adding GIPR co-agonism (as in tirzepatide and retatrutide) introduces additional Gs signalling from a second receptor type expressed on adipocytes, beta cells, and hypothalamic neurones
Ann Intern Med 2000;133:245-52
A 0.2 mg dose would require drawing 0.2 mL (20 units on a 100-unit insulin syringe)
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