How we rank vendors
Peptiverse ranks UK research-grade peptide vendors by price and lists only COA-verified suppliers. Prices refresh daily; COAs are graded and dated. For research purposes only.
1. Ranked by price
Cheapest first for the same compound and vial size.
2. COA-verified only
We only list UK vendors that publish a Certificate of Analysis. No COA, no listing.
3. COA grading
3rd-party lab (Janoshik etc.) > COA on product pages > in-house. Lab + date shown; stale COAs flagged.
4. Excluded by policy
Wholesale-only, non-UK, tanning/SARM/steroid shops and GLP-1 weight-loss sellers are not listed.
5. Fresh daily
Prices & stock re-scraped every day; COA/payment/postage re-audited by hand periodically.
6. Data-led
Vendors are ranked on the data shown: price, COA, payment and contact. Some outbound links may be affiliate.
Methodology, frequently asked
How does Peptiverse rank vendors?
By price, cheapest first, for the same compound and vial size, then by COA strength, payment options and contact.
Which vendors do you list?
Only UK vendors that publish a Certificate of Analysis (COA) for their research-grade peptides, and that are in stock. We exclude wholesale-only sellers, non-UK vendors, tanning/SARM/steroid shops, and GLP-1 weight-loss sellers.
How do you grade COAs?
Third-party lab COAs (e.g. Janoshik, Analiza Bialek) rank highest, then COAs shown on product pages, then in-house COAs. We show the lab and the COA date, and flag any COA older than ~6 months as stale.
How current is the data?
Prices and stock are re-scraped from each vendor's public catalogue every day. COA, payment, support and postage details are re-audited periodically by hand.
Do you make money from this?
Some outbound links may be affiliate links, which can earn us a commission at no extra cost to you.