Buy Peptides in the UK: Compare Suppliers First

Compare before you buy

The same research peptide can cost very different amounts from one UK supplier to the next, even for the same vial size. Looking at each supplier's site in turn is slow, and it's easy to miss a cheaper or better-documented option.

PeptideCompare collects supplier listings in one place. Every listing is converted to price per milligram, every row shows when it was last checked, and you click through to the supplier's own site to buy. We never sell, stock or ship anything ourselves.

A four-step checklist

1. Normalise the price

Compare the £/mg figure, not the vial price. A 10 mg vial at £45 is better value than a 5 mg vial at £25. Our peptide price comparison does the maths for every listing.

2. Look at the documentation

Ask for a batch-specific certificate of analysis showing HPLC purity and mass-spec identity. Listings show whether a supplier has uploaded a CoA. Our guide on how to read a certificate of analysis explains what each section means.

3. Add delivery

A cheap vial can end up costing more once delivery is added. Supplier pages show shipping costs and free-delivery thresholds where suppliers have provided them.

4. Check the exact compound

Several peptides are sold under more than one name — for example, CJC-1295 without DAC and Mod GRF 1-29 are the same molecule — and blends vary in composition between suppliers. Confirm what's actually in the vial before comparing prices.

How suppliers are ranked

Suppliers pay a flat monthly fee to list: £10 plus £1 per listing. There is no commission, no referral fee and no paid ranking. Default sorting is by price per mg, and a separate confidence score summarises link health, documentation and moderated reviews.

Research use only

Everything listed on PeptideCompare is sold by third parties for in-vitro laboratory research. It is not for human or veterinary use, and we give no dosing or usage guidance. You are responsible for making sure any purchase complies with the law that applies to you.

Start comparing

Browse the full peptide catalogue, see all listed UK suppliers, or read our guide to finding cheap peptides in the UK without compromising on documentation.