ION BLUE GHK-Cu 0.10% Copper Peptide Serum

GHK-Cu is studied at low concentrations, and copper is a potent, redox-active metal — more isn't automatically better. What matters isn't the biggest number on the label; it's knowing the real one. We disclose ours at 0.10% so you can judge it for yourself.

Apply a few drops to clean skin, morning or night, before your moisturizer (and sunscreen in the morning). Using vitamin C or retinol? Use them at the opposite time of day. Gentle enough for daily use — if your skin is sensitive, start every other day.

One active, fully disclosed: copper tripeptide-1 (GHK-Cu) at 0.10%, in a simple, fragrance-free base. No fillers, no fragrance, no proprietary blends.

GHK-Cu has a real, studied mechanism — supporting the skin's extracellular matrix and its appearance — backed by lab research and small placebo-controlled human studies. Large independent long-term cosmetic trials are still limited, so we call it evidence-backed and promising, not clinically proven to transform skin. Every claim links to primary literature on our References page.

Is 0.10% actually a lot? More than most labels admit. 0.10% sits toward the high end of the cosmetic range for GHK-Cu — and here's the part the industry skips over: GHK-Cu is a signal peptide. It works by signaling skin at low concentrations, not by sheer volume, so a bigger number isn't automatically a better one. A label that shouts “1% copper peptides” is usually a multi-peptide complex, where the actual GHK-Cu can come out to a tiny fraction of a percent — sometimes on the order of 0.001%. We skip the blend, name the real number, and set it where the research actually works.

Use it with retinol or vitamin C? Use them at different times of day.

How long until results? Gradually — weeks to months of consistent use, with subtle, appearance-level changes.

Side effects? Generally well tolerated; patch-test and introduce gradually.