GHK is a research compound. It is not approved by the FDA or any regulatory body for human use. This article is for educational and informational purposes only. Nothing here constitutes medical advice. Consult a qualified physician before considering any peptide use.
The most common research dosage for GHK is 1-3 mg (similar to GHK-Cu protocols), administered once daily via topical or subcutaneous injection. Typical cycles run 4-12 weeks. With a half-life of unknown for copper-free form, timing matters for optimal results.
What Is GHK and Why Does Dosing Matter?
GHK (Glycyl-L-Histidyl-L-Lysine) is a Collagen-modulating tripeptide. Endogenous human tripeptide found circulating in plasma; this is the copper-free form of the GHK-Cu complex. Getting the dosage right is critical — too little may produce no measurable effect, while excessive amounts increase risk without proportional benefit.
The standard research dosage for GHK has been established through preclinical studies and community protocols. This guide covers the evidence-backed dosing range, timing, and cycle structure.
What Is the Recommended GHK Dosage?
The most widely used GHK dosage is 1-3 mg (similar to GHK-Cu protocols), administered once daily via topical or subcutaneous injection.
Beginners should start at the lower end of this range and titrate upward only if needed. The half-life of GHK is unknown for copper-free form, which directly determines how often you need to dose to maintain stable blood levels.
For GHK specifically, the 4-12 weeks cycle length is standard. Longer isn't always better — Collagen-modulating tripeptide compounds require cycling to maintain receptor sensitivity.
When Should You Dose GHK?
With a half-life of unknown for copper-free form, timing your GHK administration affects peak blood levels. Most protocols call for once daily.
For peptides administered before bed (common with GH-related compounds), the goal is to amplify the natural nocturnal growth hormone pulse. For healing peptides, proximity to the injury site via local injection can improve outcomes.
Calculate Your GHK Dose
Use our free peptide dosing calculator to get exact reconstitution math and syringe units for GHK.
Open Calculator →How Do You Reconstitute GHK?
GHK typically comes as a lyophilized (freeze-dried) powder. Reconstitute with bacteriostatic water — never saline or sterile water, as BAC water contains 0.9% benzyl alcohol that prevents bacterial growth and extends shelf life to 4-6 weeks.
Use our peptide dosing calculator to determine the exact amount of BAC water to add based on your vial size and desired dose per injection.
How Long Should a GHK Cycle Last?
Standard GHK cycles run 4-12 weeks. This timeframe is based on the compound's mechanism and the time needed to observe measurable effects.
Published studies on collagen/elastin effects are almost exclusively for GHK-Cu (copper-bound), not copper-free GHK. Zero human RCTs exist for the copper-free form. Most 'GHK' research actually studies GHK-Cu.
What Side Effects Can Affect Dosing?
Zero human safety data for copper-free GHK specifically. GHK-Cu shows minimal side effects. Topical irritation possible.
If side effects emerge, the first step is typically reducing the dose rather than discontinuing entirely. Most GHK-related side effects are dose-dependent.
How Does GHK Dosing Change When Stacking?
Best used as GHK-Cu (copper-bound form) paired with vitamin C and retinoids in skincare protocols.
When stacking, some researchers reduce individual peptide doses by 20-30% since synergistic effects mean full doses of each aren't always necessary.
What Is the Bottom Line on GHK Dosing?
Start at 1, dose once daily, and run cycles of 4-12 weeks. Monitor your response and adjust within the established range.
Source matters — always use research-grade GHK from vendors with third-party COA testing. Underdosed or contaminated products are the most common reason for poor results.
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Research-Grade Sourcing
If you're going to research GHK, source matters. These are the suppliers WolveStack has vetted for purity and third-party testing.
Frequently Asked Questions
What is GHK?
GHK (Glycyl-L-Histidyl-L-Lysine) is a Collagen-modulating tripeptide. Endogenous human tripeptide found circulating in plasma; this is the copper-free form of the GHK-Cu complex. It is researched for skin regeneration support, collagen precursor activity, wound healing support.
What is the recommended GHK dosage?
Common dosages: 1-3 mg (similar to GHK-Cu protocols) administered once daily via topical or subcutaneous injection. Cycle length: 4-12 weeks. Half-life: unknown for copper-free form. Use our peptide calculator for exact reconstitution math.
What are the side effects of GHK?
Zero human safety data for copper-free GHK specifically. GHK-Cu shows minimal side effects. Topical irritation possible.
Is GHK safe?
GHK has shown a preliminary safety profile in research. Available as research chemical and cosmetic ingredient. All research should follow appropriate safety protocols.