Why Trust PLU?
Research-Backed Formulations
GHK-Cu and Matrixyl 3000 formulations informed by studies from NIH and peer-reviewed dermatological research
Visible Results in 6–8 Weeks
Users report improvements in how skin looks and hair appears with consistent daily use
Science-First Approach
Focused peptide formulations without unnecessary additives or filler dilution
GHK-Cu Products
Customer Reviews
PLU Laboratories is setting a new standard in men's skincare
"My hair looks thicker, and my skin appears years younger. The results speak for themselves"
James, 42
“I never thought I'd find a product that actually helps with my hair's appearance. My barber even noticed the difference.”
Alex, 39
“My skin feels smoother, and the fine lines around my eyes appear less noticeable. I'm impressed with the results.”
Ryan, 45
Inside the Lab: PLU’s Science & Skincare Insights
Acetyl Tetrapeptide-3: What Clinical Research Reveals About This Copper Peptide
Acetyl Tetrapeptide-3 is a biomimetic peptide extensively studied for supporting hair density appearance. Clinical research suggests this peptide may help hair appear more securely anchored by targ...
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GHK-Cu Copper Peptides: What Clinical Research Reveals
GHK-Cu has been extensively studied since 1973, making it one of the most researched peptides in cosmetic science. Clinical studies suggest this copper peptide supports skin firmness appearance and...
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Matrixyl 3000: What Clinical Research Reveals About This Peptide Complex
Matrixyl 3000 is a dual-peptide complex extensively studied in clinical research for supporting skin firmness appearance. Studies suggest this palmitoyl peptide combination works through cellular s...
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Copper Peptides for Skin
Dual-peptide face serums combining GHK-Cu with Matrixyl 3000
Browse Collection →Copper Peptides for Hair
Dual-peptide hair serums combining GHK-Cu with Acetyl Tetrapeptide-3
Browse Collection →What to Expect: Research-Based Timeline
- Weeks 1-2: Skin feels smoother or scalp feels healthier, improved overall comfort and appearance
- Weeks 3-4: Visible improvements in skin texture or hair shine appearance
- Weeks 6-8: Notable improvements consistent with clinical study timelines (skin firmness appearance or hair density appearance)
- Weeks 8-12: Continued improvements in skin elasticity or scalp health appearance
- Weeks 12+: Ongoing support for maintained appearance improvements with consistent daily use
Individual results may vary. Clinical studies examined these timeframes without hyaluronic acid, vitamin C, or DHT blocker dilution.
Frequently Asked Questions
What makes PLU Laboratories different from other copper peptide brands?
PLU Laboratories focuses on dual-peptide systems at research-informed levels without filler ingredient dilution. Most peptide serums contain either GHK-Cu or other peptides, and many dilute peptides with hyaluronic acid, vitamin C, or botanicals.
We pair complementary peptide technologies: GHK-Cu with Matrixyl 3000 for skin appearance in our GHK-Cu Face Tonic, and GHK-Cu with Acetyl Tetrapeptide-3 for hair appearance in our GHK-Cu Hair Tonic. For broader education, see our Best Copper Peptide Serum guide.
Should I use Face Tonic, Hair Tonic, or both?
Face Tonic: Targeting skin firmness appearance, fine lines, or texture? Our GHK-Cu Face Tonic combines copper tripeptide-1 with Matrixyl 3000. Browse related education in Copper Peptide Face Serum.
Hair Tonic: Targeting hair density appearance or scalp health? Our GHK-Cu Hair Tonic combines copper tripeptide-1 with Acetyl Tetrapeptide-3. Explore more in Copper Peptide Hair Serum or Men's Hair Tonic.
Both: Many customers use both daily for comprehensive support - under 60 seconds total.
How do I use these products in my routine?
Face Tonic: Apply 2-3 drops to clean, dry facial skin once daily. Then layer hydrators or moisturizer if desired. Learn more on the GHK-Cu Face Tonic page.
Hair Tonic: Apply 2-3 drops to clean, towel-dried scalp once daily. Massage, do not rinse. Details on the GHK-Cu Hair Tonic page.
Prefer to browse by category? See Copper Peptides for Skin and Copper Peptides for Hair.
Why don't PLU products include hyaluronic acid or vitamin C?
Published research on GHK-Cu, Matrixyl 3000, and Acetyl Tetrapeptide-3 examines these peptide complexes without additional actives in the same formula. Adding hyaluronic acid or vitamin C to the same bottle can lower peptide levels.
Use peptides first, then apply other actives separately. See our Copper Peptide Serum overview for more guidance.
Are these products suitable for sensitive skin?
Peptides are generally well-tolerated. Our formulas avoid parabens and sulfates and focus on peptide delivery.
If you have sensitivities, patch test first. Ingredient lists are available on the GHK-Cu Face Tonic and GHK-Cu Hair Tonic pages. Questions? Email productteam@plulaboratories.com.