UK research-peptide price comparison
Cheap Peptides UK: Compare on Price per mg
Why price per mg is the only fair comparison
Research peptides come in different vial sizes, so the headline price can mislead. Divide the price by the milligrams in the vial and the picture often changes:
| Vial | Price | Price per mg |
|---|---|---|
| 5 mg | £24 | £4.80 |
| 10 mg | £40 | £4.00 |
| 20 mg | £70 | £3.50 |
PeptideCompare calculates £/mg for every listing automatically and sorts by it by default, so the cheapest option per milligram is at the top.
Where savings actually come from
- Larger vial sizes usually cost less per mg. See our peptide wholesale guide.
- Delivery thresholds. Combining items with one supplier can unlock free delivery.
- Genuine price drops. Rows show a last-checked date, so you can tell a real reduction from an old listing. Our peptides sale guide explains how to spot one.
- Equivalent compounds sold under different names. Comparing them together can reveal a cheaper listing for the same molecule.
When cheap is a warning sign
A price far below every other listing for the same compound deserves a closer look:
- Is there a batch-specific certificate of analysis, with mass-spec identity as well as HPLC purity?
- Is the form the same — for example, the same salt, and the same full-length or fragment version?
- For long, complex peptides, very low prices can point to under-filled or mislabelled vials.
Our guide to pure peptides in the UK covers what purity claims mean in practice.
Free for researchers, flat-fee for suppliers
Comparing prices costs nothing. Suppliers pay a flat £10 a month plus £1 per listing, and no commission — so a supplier can't pay to appear cheaper or higher up.
Research use only
Listings are third-party products for in-vitro laboratory research only. They are not for human or veterinary use, and PeptideCompare gives no dosing or usage advice.
Start with the full catalogue or go straight to price comparison.
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Frequently asked questions
How do I compare peptide prices fairly?+
Compare price per milligram rather than headline vial price. PeptideCompare normalises every listing to £ per mg and shows delivery separately.
Is the cheapest peptide the best choice?+
Not necessarily. Unusually low prices can signal quality or identity problems. Always request a certificate of analysis and check the supplier's documentation yourself — PeptideCompare does not audit suppliers.
Do suppliers pay to rank higher?+
No. Suppliers pay a flat listing fee and never a commission. Ranking is by price per milligram.
Selling research peptides in the UK?
List your products for £10 a month plus £1 per listing — zero sales commission, and ranking is by price per milligram, never by who pays more.
See supplier pricing