An intramuscular injection is the fast, no-fuss route: a quick shot that delivers a concentrated dose straight past the digestive system in a couple of minutes with no downtime

This may include instances where: You need a stronger product to achieve your goals (e.g., deep hyperpigmentation, severe acne, etc.) You already use another product containing copper (this could be unsafe) An essential part of your skin care routine is a harsh active, vitamin C, strong exfoliant, or salicylic acid many of which are common ingredients in acne treatments and anti-aging products (copper peptides shouldnt be mixed with them) Using copper peptides may be unsafe (i.e., you have Wilsons disease, a peptide allergy, or active/suspected cancer) Youve tried a copper peptide product in the past and experienced an adverse reaction (e.g., copper uglies or troublesome side effects) If youd like some alternatives to copper peptides, we go over a few in the Alternatives to copper peptide serums section later in this guide
It absorbs straight into your skin, which is great if you have oily or combo skin and want a glowy look
Side Effects of GHK-Cu Using GHK-Cu is usually safe & tolerated well, but side effects can happen: Redness or irritation Dryness or peeling Increased sensitivity to other products Breakouts or small bumps Unknown long-term effects GHK-Cu speeds up skin renewal, which can trigger temporary redness, peeling, or bumps as your skin adjusts