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What Is GHK-Cu? Copper Peptide Research Guide Australia

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Local skin reactions in topical studies are generally described as uncommon, with some sources citing rates around 5 to 10 percent Pruritus, or itching, occurs in roughly 4 to 6 percent of users, usually right at the application site True allergic contact dermatitis from GHK-Cu is considered rare, estimated at 1 to 3 percent in some product contexts Copper contact allergy overall is uncommon, with one often-cited review reporting positive patch-test reactions in about 3.8 percent of tested subjects These numbers show that while reactions can happen, severe allergic responses remain the exception rather than the rule