Research peptide retailer
CK Peptides
London research-peptide retailer with 99%+ HPLC (Janoshik), third-party CoAs, RUO framing and a Trustpilot profile.
Headline price
£3.99 to £79.99
Regulated as
Not disclosed
Delivery area
UK-wide
Certificate of Analysis profile
CoA per batch
Unverified
Access
On request
Lab
Janoshik
QR-verifiable
No
CoA profile auto-refreshed monthly. See methodology for scoring.
Best for
Best for third-party Janoshik CoAs and active education content
Weak on
No Companies House number surfaced; bank-transfer/crypto only; CoA available rather than auto-included.
What stands out
- · Janoshik third-party CoAs
- · Minimum 99% purity
- · London address + WhatsApp support
Our verdict
Meets the floor across purity, CoA, RUO framing, UK address and contact. Bank-transfer/crypto-only checkout and the missing entity number are minor watch-items.
Last reviewed 2026-06-03. PeptideClear earns a referral fee when readers click through and convert. Editorial criteria are documented in our methodology.
Ready to start?
Visit CK Peptides →
Affiliate link. No price difference for you.
Ready to buy
Shop UK peptides, collagen and GLP-1 routes
Compare UK retailers, clinics and pharmacies across every PeptideClear category.