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GHK-Cu copper peptide serum
Look like yourself again.
The copper peptide your body makes less of as you age — put back at a dose you can actually read on the label.
- 0.2% actual active GHK-Cu — the real number, printed on the label
- Formulated at the concentration studied in the research
- Fragrance-free and dye-free — the blue is the copper itself
60-day money-back guarantee · Ships cold · Refrigerate on arrival
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What's actually in the bottle
What's actually in the bottle
- Active
- GHK-Cu (Copper Tripeptide-1)
- Concentration
- 0.2% actual active peptide
- pH
- 5.5–6.5
- Fragrance
- None
- Dyes
- None (the blue is the copper itself)
Most “1% GHK-Cu” serums are really a 1% pre-made solution — about 0.01% actual peptide. We print the real number. No proprietary blends. No hiding behind a label.
BANNER
Smiling woman · real skin · natural light
The science, honestly
Real research. Realistic promises.
Published research on GHK-Cu
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Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data
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The Potential of GHK as an Anti-Aging Peptide
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Topically Applied GHK as an Anti-Wrinkle Peptide: Advantages, Problems and Prospective
Questions, answered honestly
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Use copper peptides and vitamin C / strong acids / retinol at different times (for example, peptides in the morning, retinol at night), not layered in the same step.
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With GHK-Cu, more isn't automatically better — too much can work against you. 0.2% actual active sits at the top of the studied range. We'd rather show you the honest number than inflate it.
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Think 8–12 weeks of consistent use for firmness and texture, not overnight. It's a marathon, not a sprint.
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Copper peptides degrade over time, so we make it in small batches, ship it cold in an insulated mailer with a cold pack [VERIFY: packaging], and never sell more than a 30-day supply at once. Put it in the fridge when it arrives.
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The blue is the copper itself, not an added dye. Copper compounds turn blue and blue-green — the same chemistry that patinas a copper roof. When you see the color, you're seeing the active present in the bottle.
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Everything. Use it daily for up to two months — that's enough time to actually judge a peptide. If you don't love what you see, email us and you get a full refund: no photos, no questionnaires, no store credit.
How to use it
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01
Cleanse
Start with clean, slightly damp skin.
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02
Apply 3–4 drops
Press gently into the face and neck, and let it absorb.
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03
Moisturize (+ SPF in the morning)
Seal it in. Sunscreen every morning — it's the other half of the routine.
Start 2–3 times a week and build up as your skin adjusts.
No risk
Try it on us for 60 days.
Use it daily for two full months. If your skin doesn't love it, one email brings a full refund — no photos, no forms, no store credit.
Shop the serum — $39.99Read the label first? You'll fit right in.
Cuprum Labs is for people who fact-check their skincare. Here's what they're saying.
4.7
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★★★★★
“GHK-Cu changed my skincare game. After 4 weeks the fine lines around my eyes are noticeably softer and my skin looks plumper.”
Sarah M.
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★★★★☆
“Almost 5 stars! My crow’s feet have faded a lot in a month and my texture is smoother than it’s been in years. Only wish the bottle was bigger.”
Elena Rodriguez
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★★★★★
“As a guy in my 40s I was skeptical, but my forehead lines are way less visible and my skin has a healthy glow I haven’t seen in ages.”
David Kim
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★★★★★
“Best peptide serum I’ve used. My acne scars are fading and my overall skin tone is more even. Permanent part of my routine now.”
Priya Patel
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★★★★☆
“Really impressed. My skin feels more resilient and the fine lines around my mouth are softening. Took a bit longer than expected but the results are real.”
Jamal Wright
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★★★★★
“My skin looks stronger and I get compliments on my glow all the time. This is my holy grail now.”
Sophia Chen
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★★★★★
“My under-eye area looks brighter and less puffy. Even my husband noticed the difference. Best I’ve tried.”
Aisha Khan
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★★★★☆
“Very effective — my post-acne marks are fading quicker than with anything else and my skin feels hydrated. Only minor complaint is the slight scent.”
Carlos Mendoza
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★★★★★
“Reduced redness, smoother texture, and visibly softer lines. I tell all my friends about it.”
Kevin Park
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★★★★☆
“Great results on sun-damaged skin — spots are lighter and my tone is more even. Took about 5 weeks but I’m pleased.”
Robert Hayes
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★★★★☆
“Love the visible firmness and glow, and my fine lines are definitely reduced. Just wish the dropper was a bit more precise.”
Olivia Bennett
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★★★★★
“My skin has never felt this resilient. Even after late nights my face bounces back. I’m a believer.”
Freya Lindström
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★★★★☆
“Very happy with the results — skin is bouncier and fine lines are softer. A tiny bit pricey but worth it.”
Nora Eriksson
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★★★★★
“Pores look minimized and my tone has evened out. I look fresh without much effort now.”
Kai Nakamura
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★★★★★
“My crow’s feet have softened so much I almost don’t recognize myself, in the best way. Thank you!”
Sophia Moreau
Your skin, minus the guesswork.
Shop the serum0.2% actual active · measured & disclosed · ships cold