The signal
1.5% GHK-Cu Copper Peptides
Triggers collagen and elastin production at the cellular level. 30+ years of peer-reviewed research confirm it — this is the ingredient that makes real structural change possible.
Backed by 30 years of research
Your skin already knows how to heal.
Give it what it needs.
A copper peptide serum that works with your biology — not against it. GHK-Cu signals your skin to rebuild collagen, repair damage, and restore what time has taken.
View the Serum →★★★★★571 reviews · 30-day guarantee
★★★★★ 4.8 from 571 reviews
30-day money-back guarantee
5,000+ customers
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Researched since 1973
2–3 business day delivery
The biology
What’s actually happening to your skin after 25
01
Collagen production slows — by design
After your mid-twenties, your skin’s fibroblasts gradually produce less collagen. By 40, output is nearly half what it was at 20. This is not damage — it’s biology. But it can be addressed.
02
GHK-Cu levels fall in lockstep
GHK-Cu is a copper peptide naturally produced in plasma and saliva. Levels fall from ~200 ng/ml at age 20 to under 80 ng/ml by 60 — the same window as skin’s collagen decline.
03
Topical application restores the signal
Studies by Pickart, Finkley, and others show that topical GHK-Cu at 1%+ activates fibroblasts, triggers collagen and elastin production, and supports the skin’s own repair cycle.
The evidence
30 years of research. One clear conclusion.
Since Dr. Loren Pickart first isolated GHK-Cu in human plasma in 1973, over 50 peer-reviewed studies have examined its role in tissue repair, collagen synthesis, and skin aging. We don’t make claims. We cite studies.
See the full formula →50+
peer-reviewed studies on GHK-Cu
1973
year the research began
1.5%
concentration shown to activate fibroblasts
87%
users reporting improved firmness at 30 days
The formula
Every ingredient earns its place.
No fillers. No trends. Each ingredient was chosen because the research said so.
The material
2.5% Collagen Tripeptides
Small-chain peptides that actually cross the skin barrier. They give your fibroblasts what they need to rebuild from within — not just at the surface.
The protector
2.5% Vitamin C
Neutralizes free radicals, evens skin tone, and stabilizes the collagen you’re building. Works with GHK-Cu to lock in the results.
The finisher
Zinc + Palmitoyl Peptide Complex
Calms inflammation, supports the skin’s repair cycle, and strengthens density over time. Palmitoyl tripeptides amplify the collagen-building signal.
What’s different
Most serums work around the problem. This one goes to the source.
What most serums do
- —Add moisture on the surface
- —Temporarily plump with hyaluronic acid
- —Brighten with actives that fade quickly
- —Never reach the dermal layer
- —Results stop when you stop using them
What this does
- ✓Signals fibroblasts to produce new collagen
- ✓Supports elastin rebuilding at depth
- ✓Provides collagen tripeptides as building material
- ✓Backed by 50+ peer-reviewed studies
- ✓Real structural change — not a surface effect
Simple by design
A ritual you’ll actually stick to.
01Cleanse your face
02Dispense 3–4 drops into your palm
03Press gently into face and neck — don’t rub
04Follow with your moisturizer
05Morning or evening — both if you can
What users report
30 days. Real skin. Real difference.
87%
reported improved firmness within 30 days
4.8★
average rating across 571 verified reviews
30
day money-back guarantee, no questions asked
571 verified reviews
What people are saying.
Ready to start?
CollagenicBoost™ GHK-Cu Serum
$45.00
- ✓1.5% GHK-Cu — proven collagen signal
- ✓Vitamin C, Zinc & Palmitoyl peptides
- ✓2–3 business day delivery
- ✓30-day money-back guarantee
Free shipping on orders over $50
Questions
Everything you want to know.
Real answers. No runaround.
Still have questions?
Our team responds within 24 hours. We’re actual humans who know the science.
What exactly is GHK-Cu?
GHK-Cu (Glycyl-L-Histidyl-L-Lysine copper) is a naturally occurring copper peptide found in human plasma, saliva, and urine. It plays a key role in wound healing and collagen synthesis. Levels decline significantly with age — dropping by about 60% between ages 20 and 60. Our serum restores it to levels that support your skin’s repair mechanisms.
When will I actually see results?
Most people notice changes in skin texture and firmness within 3–4 weeks. Visible improvement in fine lines typically appears between weeks 4–8. Collagen remodeling is a biological process — real and lasting, but it takes time. We back this with a 30-day guarantee so you can experience it risk-free.
Is this suitable for sensitive skin?
Yes. The formula is designed to be well-tolerated across skin types, including sensitive skin. If you’re introducing copper peptides for the first time, start with once daily and increase to twice daily after the first week. If you have a specific skin condition or concern, consult a dermatologist before use.
Can I layer it with other serums or actives?
Yes, with one note: avoid combining GHK-Cu with strong exfoliating acids (AHAs/BHAs) or retinol in the same step, as this can reduce efficacy and increase sensitivity. Use our serum on its own, and alternate with other actives if needed. It layers well under moisturizer.
What is your return policy?
30-day money-back guarantee, no questions asked. If you’re not satisfied with your results, contact us within 30 days of purchase and we’ll issue a full refund. We stand behind the science — and behind your purchase.
How is this different from other copper peptide serums?
Most copper peptide products use sub-therapeutic concentrations (<0.5%) and dilute them with large amounts of fillers. Ours leads with 1.5% GHK-Cu — the minimum shown in research to activate fibroblasts — and pairs it with collagen tripeptides, Vitamin C, and zinc in clinically-informed ratios. No filler ingredients that dilute what matters.
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Just science that works — or your money back.
Free shipping on orders over $50
✓ 30-Day Guarantee✓ Science-backed✓ No subscription✓ Free returns