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A 2016 study published in Nature Scientific Reports directly compared copper compounds and found that while copper chloride and copper acetate were highly cytotoxic, GHK-Cu showed no cytotoxicity across all tested concentrations and did not induce inflammatory markers

Research on peptide reconstitution techniques has observed that mechanical stress such as vigorous shaking or direct injection onto the powder causes aggregation and structural changes that cannot be reversed

Journal of Neurochemistry, 85 (2), 503-514

And for the first time in medical history, we may have a way to reconnect it

Psychoneuroendocrinology 36 , 6876, (2011)