GHK-Cu Peptide: Dosage, Protocol, Reconstitution, and Skin & Hair Regeneration Guide

GHK-Cu Peptide

GHK-Cu (glycyl-L-histidyl-L-lysine:copper complex) is a naturally occurring copper peptide involved in wound healing, tissue remodeling, collagen synthesis, and anti-inflammatory signaling. Research shows it influences gene expression related to regeneration, antioxidant defense, and skin repair.

How GHK-Cu Works

Collagen ↑ → Tissue Repair ↑ → Inflammation ↓ → Skin & Hair Regeneration ↑

GHK-Cu is often discussed for skin quality, wound healing, connective tissue repair, and hair support. It is commonly used in both cosmetic-focused and healing-focused protocols, with dose ranges varying by goal.

Standard Protocol (5 Days / Week)

50 mg vial → 3.0 mL BAC Water → 1 unit = 167 mcg

Standard Setup

Vial 50 mg

Water 3.0 mL bacteriostatic water

Concentration 16.67 mg/mL

Conversion 1 unit = 166.7 mcg

Weeks 1–4

Assess Tolerance

Dose1.0 mg (1000 mcg)

Units6 units

Volume0.06 mL

Weeks 5–8

Increased Response

Dose1.5 mg (1500 mcg)

Units9 units

Volume0.09 mL

Weeks 9–12+

Full Protocol

Dose2.0 mg (2000 mcg)

Units12 units

Volume0.12 mL

GHK-Cu is often used in a gradual build structure. Lower ranges are commonly used for skin-focused support, while higher ranges are more often discussed for connective tissue or injury-focused protocols.

Alternative Protocol (3× Weekly)

Weeks 1–12+

Simplified Protocol

Dose2.0 mg (2000 mcg)

Units12 units

Volume0.12 mL

Frequency3× weekly

This lower-frequency structure is a simpler option when daily use is not preferred, though many still favor more frequent dosing in skin and tissue-focused protocols.

How to Use GHK-Cu (Cycle, Timing & Injection)

Standard FrequencyOnce daily, 5 days per week

Alternative Frequency3× weekly

Injection TypeSubcutaneous

Cycle LengthOften 8–12+ weeks

Time Between Cycles

Standard Cycle8–12 weeks

Time Off2–4 weeks

Extended Option12–16 weeks, then 4 weeks off

Simple takeaway:

GHK-Cu is usually run in 8–12 week support phases, followed by 2–4 weeks off. Longer cosmetic or tissue-repair phases may extend to 12–16 weeks before taking a break.

Best Time to Take

Consistent timing matters more than exact time of day

Morning or evening can both work

Many use it at a consistent daily time for easier tracking

Topical or cosmetic-focused users may align timing with their broader skin-care routine

Where to Inject

Abdomen (most common)

Thigh or upper arm

Near a target area can be discussed in some healing-focused protocols

Rotate injection sites regularly

When to Use

For skin-focused support phases

During tissue repair or recovery periods

When hair or follicle support is the main goal

As a longer regenerative-support phase rather than a short aggressive cycle

Simple Strategy

Goal-Based Use

Lower doses are often used for skin and cosmetic support, while higher doses are more often discussed for injury or deeper tissue repair.

Consistency

GHK-Cu is usually more about steady regenerative support over time than fast noticeable changes.

Reconstitution & Dosing (50 mg Vial)

Reconstitution & Dosing

Vial50 mg

Water3.0 mL bacteriostatic

Concentration16.67 mg/mL

Conversion1 unit = 167 mcg

Common Conversions

1 mg = 6 units (0.06 mL)

1.5 mg = 9 units (0.09 mL)

2 mg = 12 units (0.12 mL)

Reconstitution Steps

Draw 3.0 mL bacteriostatic water

Inject slowly down vial wall

Gently swirl (do not shake)

Refrigerate immediately

Protect from light

Storage & Shelf Life

Storage & Shelf Life

Lyophilized (unmixed)

Refrigerated (2–8°C): ~12–24 months

Frozen (−20°C): up to ~2–3 years

Reconstituted (mixed)

Refrigerated (2–8°C): ~30 days typical use window

Avoid freezing after mixing (can degrade structure)

Important

Lyophilized Stability

Lyophilized GHK-Cu is relatively stable when kept cold and protected from light. Freezing significantly slows degradation and is best for long-term storage.

After Reconstitution

Once reconstituted, stability drops more quickly. Refrigeration and minimal handling help preserve potency.

Benefits

Improves skin elasticity and reduces wrinkles

Enhances wound healing and recovery

Promotes hair growth and follicle health

Reduces inflammation and oxidative stress

Supports long-term tissue regeneration

Potential Side Effects

Possible skin irritation (topical use)

Temporary redness or sensitivity

Rare systemic effects

Stacking Strategies

GHK-Cu → Collagen & Tissue Repair
BPC-157 → Healing & Blood Flow
TB-500 → Systemic Recovery

Skin: GHK-Cu + microneedling / topical routine

Healing: GHK-Cu + BPC-157

Advanced: GHK-Cu + BPC-157 + TB-500

Important Notes

Dosing varies by goal (cosmetic vs healing)

Lower doses are often effective for skin applications

Higher doses are more often used for injury repair

Protocols are commonly based on clinical practice patterns and goal context

Important Disclaimer

GHK-Cu is investigational and not FDA-approved. Educational use only.

GHK-Cu Guide → Peptide Directory →