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No cycling required: Unlike injectable protocols (8 weeks on / 8 weeks off), topical GHK-Cu does not require cycling
But a 2025 interview study of 29 self-reported users found something else entirely average age 39, more than three in four men, most introduced to it through gym and bodybuilding circles years before any tanning trend existed online
It rarely becomes severe enough to interfere significantly with daily activities
One exclusion is drugs used for anorexia, weight gain, or weight loss (even if used for a non-cosmetic purpose (i.e., morbid obesity). What is being done: In June, the House Ways and Means Committee took a baby step toward reversing this exclusion
Keep it away from light, ideally in a drawer or wrapped in foil
