Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.

Best GHK-Cu Vendors of 2026

Ranked by Price, Purity, and Reputation

Quick Comparison

Rank	Vendor	Price	Amount	$/mg	COA	Score	Action
1	Certified Pep	$56.00	100mg	$0.56/mg	Yes	9.6/10	View
2	Ascension Peptides	$62.00	100mg	$0.62/mg	Yes	9.3/10	View
3	Penguin Peptides	$54.00	50mg	$1.08/mg	Yes	8.8/10	View
4	Limitless Biotech	$78.99	50mg	$1.58/mg	Yes	8.8/10	View
5	Penguin Peptides	$85.00	100mg	$0.85/mg	Yes	8.8/10	View

How We Score Vendors

Our scoring is based on three weighted factors:

Price Competitiveness (40%)

Normalized to cost per milligram for fair comparisons across vial sizes.

COA Availability (30%)

Third-party lab testing confirming purity, identity, and absence of contaminants.

Vendor Reputation (30%)

Community feedback, shipping reliability, customer service, and business track record.

Related Resources

Complete GHK-Cu Guide

Dosing protocols, research findings, and safety information

GHK-Cu Dosing Guide

Research protocols and administration methods

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Tools

Reconstitution Calculator Storage Guide Peptide Matcher