PLU Laboratories
All PLU Laboratories Products
Dual-peptide formulations at clinical concentrations. GHK-Cu copper peptides combined with complementary amino acid technologies for skin and hair appearance.
Why Dual-Peptide Systems Outperform Single-Peptide Serums
Most peptide serums contain either GHK-Cu OR other peptides, rarely both. Many dilute their active ingredients with hyaluronic acid, vitamin C, or botanical extracts, reducing the peptide concentrations studied in clinical research.
PLU Laboratories combines complementary peptide technologies at concentrations examined in published literature. Our Face Tonic pairs GHK-Cu (signal and carrier peptides) with Matrixyl 3000 (matrikine signal peptides) for skin appearance. Our Hair Tonic pairs GHK-Cu with Acetyl Tetrapeptide-3 (biomimetic follicle-support peptides) for hair appearance.
No hyaluronic acid, vitamin C, or DHT blocker dilution. Just the peptide concentrations studied in research. Learn more about our approach on our best copper peptide serum guide.
Our Dual-Peptide Products
Face Tonic
GHK-Cu + Matrixyl 3000
Dual-peptide system combining copper tripeptide-1 (1% GHK-Cu) with complete Matrixyl 3000 (3% Palmitoyl Tripeptide-1 + Palmitoyl Tetrapeptide-7). Signal peptides, carrier peptides, and matrikine peptides working through complementary pathways studied for skin firmness appearance, fine lines, and skin texture.
Apply 2-3 drops to clean facial skin once daily. Takes under 30 seconds.
Shop Face Tonic →Hair Tonic
GHK-Cu + Acetyl Tetrapeptide-3
Dual-peptide system combining copper tripeptide-1 (1% GHK-Cu) with Acetyl Tetrapeptide-3 (1%) for comprehensive hair appearance support. Signal peptides, carrier peptides, and biomimetic follicle-support peptides working through complementary mechanisms studied for hair density appearance and scalp health.
Apply 2-3 drops to clean scalp once daily. Takes under 30 seconds.
Shop Hair Tonic →Shop by Category
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 using specific peptide concentrations without hyaluronic acid, vitamin C, or DHT blocker dilution.
Frequently Asked Questions
What makes PLU Laboratories different from other peptide brands?
PLU Laboratories focuses on dual-peptide systems at clinical concentrations without filler ingredient dilution. Most peptide serums contain either GHK-Cu OR other peptides, and many dilute peptides with hyaluronic acid, vitamin C, or botanical extracts.
Our approach combines complementary peptide technologies: GHK-Cu (signal and carrier peptides) + Matrixyl 3000 (matrikine signal peptides) for skin, or GHK-Cu + Acetyl Tetrapeptide-3 (biomimetic peptides) for hair. This maintains the concentrations examined in clinical research. Learn more on our best copper peptide serum guide.
Should I use Face Tonic, Hair Tonic, or both?
Face Tonic: If you're targeting skin firmness appearance, fine lines, or skin texture, our copper peptide face serum combines GHK-Cu with Matrixyl 3000 for comprehensive skin appearance support.
Hair Tonic: If you're targeting hair density appearance or scalp health, our copper peptide hair serum combines GHK-Cu with Acetyl Tetrapeptide-3 for follicle-level support.
Both: Many users apply both products daily for comprehensive peptide support across face and scalp. Both together take 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. The dual-peptide system absorbs quickly. Layer hyaluronic acid or moisturizer after if desired.
Hair Tonic: Apply 2-3 drops to clean, towel-dried scalp once daily. Gently massage for absorption. No rinsing needed.
Both products are designed for maximum efficiency—under 30 seconds each. For comprehensive guidance, explore our face serum for men and men's hair tonic collections.
Why don't PLU products include hyaluronic acid or vitamin C?
The clinical research on GHK-Cu, Matrixyl 3000, and Acetyl Tetrapeptide-3 examined these peptides as focused complexes, not diluted with hyaluronic acid, vitamin C, or other actives in the same formulation. Adding these ingredients reduces the peptide concentrations studied in published literature.
Our products maintain clinical peptide concentrations by focusing exclusively on complementary peptide technologies. If you want hyaluronic acid or vitamin C, apply them separately after the peptides absorb to maintain peptide efficacy. Learn more about our formulation philosophy on our copper peptide serum page.
How long do PLU products last?
We sell our products in both a 4 and 12 week supply (0.33 fl oz and 1 fl oz). We recommend using the entire bottle within a year, but feel you won't have any issue once you see the effects on your skin and hair.
The lightweight formulations absorb quickly, so a little goes a long way. Most users find 2-3 drops sufficient to cover the entire face or target scalp areas. Both GHK-Cu products are designed for efficient daily use.
Are these products suitable for sensitive skin?
Research suggests peptides are generally well-tolerated across different skin types due to their amino acid-based mechanisms. Our formulations focus on peptide delivery without harsh ingredients, parabens, or sulfates.
However, individual sensitivities can vary. We recommend patch testing any new product before full application. If you have concerns about ingredient compatibility with existing skin conditions, consult healthcare providers before use. Contact us at productteam@plulaboratories.com with specific questions.