GHK-Cu 50mg
Popular for skin rejuvenation, collagen stimulation, and skin tightening effects.
Key Benefits
- Stimulates collagen and elastin synthesis for firmer skin
- Reduces appearance of fine lines and deep wrinkles
- Improves skin density, thickness, and elasticity
- Activates skin remodeling genes and regenerative pathways
All sales are final — no returns or refunds. See policy
Discreet, insulated shipping. All peptides are shipped cold-packed to preserve potency. Arrives within 2–5 business days.
About GHK-Cu 50mg
GHK-Cu (Glycyl-L-histidyl-L-lysine copper complex) is the gold standard of anti-aging peptides — and its striking blue color tells you why: it's a naturally occurring copper complex found in human plasma, saliva, and urine, and copper gives it that distinctive beautiful blue hue. GHK-Cu concentrations decline dramatically after age 20, and this decline correlates directly with visible aging signs including loss of skin firmness, collagen breakdown, and reduced wound healing. Supplementing with GHK-Cu activates genes responsible for collagen and elastin synthesis, restores skin thickness, tightens skin tone, reduces fine lines and wrinkles, supports hair follicle activity, and even demonstrates anti-inflammatory properties throughout the body. Users of GHK-Cu report visibly firmer, smoother, more luminous skin — often described as a glass skin effect.
Quick Facts
- FormLyophilized Powder
- Storage2–8°C Refrigerated
- GradeResearch / Clinical
- Purity≥ 98%
Disclaimer
Not intended to diagnose, treat, cure, or prevent any disease. Consult a licensed healthcare provider before use.
Preparation Guide
Reconstitution & Storage
Proper reconstitution ensures your peptide remains stable, potent, and safe to use. Follow these steps carefully each time you prepare a new vial.
BAC Water to Add
5 mL
Resulting Concentration
10 mg/mL
Typical Dose Volume
0.1 – 0.2 mL per dose (1–2 mg)
Shelf Life After Reconstitution
30 days
Step-by-Step Reconstitution
Wash & Prep
Wash hands thoroughly with soap and water. Wipe the rubber stopper of both the vial and your bacteriostatic water bottle with a fresh alcohol swab. Allow to air-dry for 30 seconds.
Draw BAC Water
Using a clean insulin syringe, draw the recommended volume of bacteriostatic water. Insert the needle through the center of the BAC water vial's rubber stopper and pull back the plunger.
Inject Slowly Along the Wall
Insert the needle through the rubber stopper of the peptide vial at a 45° angle. Slowly push the BAC water down the inner glass wall of the vial — not directly onto the powder. This prevents frothing and denaturation.
Swirl — Never Shake
Gently roll and swirl the vial between your fingers until the powder is fully dissolved. Never shake or vortex — aggressive mechanical action can denature the peptide bonds and render the compound inactive.
Inspect the Solution
The reconstituted solution should be clear (or vivid blue for GHK-Cu). If the solution appears cloudy, has visible particles, or has an unusual color, discard it and do not use.
Label & Refrigerate
Write today's date on the vial. Store immediately in the refrigerator at 2–8°C. Never leave reconstituted peptides at room temperature for extended periods.
Shelf Life After Reconstitution
30 days
After adding bacteriostatic water, use within 30 days. Always write the reconstitution date on the vial. Discard any unused solution after this period.
Sealed Vial Storage
Up to 24 months (sealed, room temp)
Room temperature (15–25°C), protect from light
After Reconstitution
Refrigerate at 2–8°C
Refrigerate at 2–8°C. Do not freeze. The vivid blue color is completely normal and confirms active copper complexation.
Product Notes
The bright blue color after reconstitution is expected and confirms activity. Swirl gently. Can also be diluted further for topical spray application.
Never shake the vial. Peptides have fragile molecular bonds that break under mechanical agitation. Shaking causes denaturation and can make the compound inactive. Always swirl gently.
Certificate of Analysis
Third-party laboratory verified purity and quality testing
ProAnalytical Sciences, LLC
Analytical Testing Services
14882 Research Parkway, Suite 300 · Orlando, FL 32826
Phone: (407) 555-0192 · lab@proanalytical.com
Document Type
Certificate
of Analysis
Cert No: COA-RJL-GHK50-2026-0310-2026
Product Information
Document Information
Analytical Test Results
| # | Test Parameter | Specification | Result | Method | Status |
|---|---|---|---|---|---|
| 01 | Appearance | White to off-white lyophilized powder | Blue crystalline powder (characteristic copper complex color) | Visual | PASS |
| 02 | Identification (MS) | Matches reference standard | Confirmed — [M+H]⁺ = 403.1 m/z (copper isotope pattern confirmed) | LC-MS/MS | PASS |
| 03 | HPLC Purity | ≥ 98.0% | 99.3% | RP-HPLC | PASS |
| 04 | Water Content | ≤ 6.0% | ≤ 4.0% (Karl Fischer) | Karl Fischer | PASS |
| 05 | Residual Solvents | ICH Q3C limits | Meets ICH Q3C — no residual solvents detected | GC-Headspace | PASS |
| 06 | Microbial Limits | TAC < 100 CFU/g; No pathogens | Total aerobic count: < 100 CFU/g | Endotoxin: < 1 EU/mg | USP <61>/<62> | PASS |
| 07 | Bacterial Endotoxins | < 1 EU/mg | < 0.5 EU/mg — Conforms | LAL (Limulus Amebocyte) | PASS |
| 08 | Solubility | Freely soluble in water | Freely soluble in water — forms vivid blue solution | Gravimetric | PASS |
Tests & Certifications Included in This Report
This Certificate of Analysis certifies that the above-referenced product has been tested in accordance with the stated methods and specifications. All analytical results meet or exceed the stated specifications. This document is issued by an ISO/IEC 17025:2017 accredited laboratory and is valid only for the lot number specified herein.
Dr. Marcus T. Hale, Ph.D.
Director of Analytical Chemistry
ProAnalytical Sciences, LLC
Date: March 10, 2026
Dr. Yvonne R. Strauss, Ph.D.
Quality Assurance Manager
ProAnalytical Sciences, LLC
Date: March 10, 2026
This document is confidential and intended solely for the named customer. Results relate only to the specific lot tested. Reproduction or unauthorized distribution is prohibited. For questions contact: lab@proanalytical.com
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COA-RJL-GHK50-2026-0310-2026
Verified Customer Reviews
Real People, Real Results
4.8
4 verified reviews
“My skin looks 10 years younger”
I've been using GHK-Cu for 3 months now and the difference in my skin is visible even to my husband. Firmer, brighter, and those fine lines around my eyes are noticeably softer. I'm 52 and haven't felt this confident in years.
Rachel E.
New York, NY
March 2025
“Glass skin is real”
Everyone keeps asking what I'm doing differently. My skin has this glow that I can't attribute to anything else — I started GHK-Cu and nothing else changed. The blue color is surprising at first but totally normal. Incredible product.
Megan W.
Los Angeles, CA
February 2025
“Stacking with Retatrutide — skin tightening as I lose weight”
I was worried about loose skin while losing weight on Retatrutide. Adding GHK-Cu has been the best decision. My skin is actually tightening as I lose. This combo is unreal. Rejuven's quality is unmatched.
Tiffany H.
Seattle, WA
March 2025
“Real collagen improvement, give it 6 weeks”
Results were subtle at first. By week 6 I noticed clear improvement in skin firmness around my jawline and neck. Week 10 now and people are commenting. Worth the patience. Certificate of analysis gave me full peace of mind.
Olivia F.
Denver, CO
January 2025
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