Why do UK peptide prices vary so much?

Put the same compound into five UK peptide websites and you'll get five prices, sometimes with a threefold spread between the cheapest and the dearest. It's natural to assume the expensive one is better. Much more often, the difference was spent on things that never go near the vial.

1. Compare per milligram, not per vial

The biggest source of confusion is that vial sizes differ. A 2mg vial at £9 looks cheap next to a 10mg vial at £19, until you notice one is £4.50 a milligram and the other is £1.90.

Small vials cost more per milligram everywhere, for a boring reason: the vial, the stopper, the label and the postage cost the same whether there are 2mg or 20mg inside. Price per milligram is the only comparison that means anything.

2. Marketing you're paying for

Mainstream advertising platforms largely refuse research peptides, so most brands find customers through affiliate links, influencer discount codes and sponsored posts. The commission comes out of every sale, and it's built into the price everyone pays.

A "20% off with my code" price is very often just the normal price with the influencer's commission handed back to you.

3. Card processing

Card processors treat research chemicals as high-risk. Sellers that take cards typically pay higher fees and have money held back as a reserve, and that cost goes into the price. Sellers that take bank transfer avoid most of it.

4. Overheads and brand spend

Sponsorships, paid placements, glossy packaging and big teams all cost money, and all of it is recovered from the price of a vial. None of it changes what's inside.

5. Buying in quantity

Suppliers that publish a bulk rate pass on some of what they save by moving stock in boxes rather than single vials. If you're buying more than a few of the same compound, a box price is usually the cheapest way in.

How to compare fairly

• —Work out the price per milligram, at the same vial size where you can.
• —Check the price without any discount code, then see what the code really saves.
• —Look for a published bulk or box rate.
• —Add delivery. A cheap vial with expensive postage isn't cheap.
• —Check the supplier is a real, registered business with reviews on independent sites.

Where we sit, and why

We don't run ads, pay affiliates or hand out influencer codes. We grow by word of mouth, and that cost isn't in our prices, which is the main reason they're lower than most. We take bank transfer and crypto rather than cards, which keeps fees out too. Every price is published in full, including the box-of-ten rate, and delivery is free over £50. See them all on one page, priced per milligram.

You don't have to take our word for it. PepFinder compares UK prices per milligram independently, and our listing there shows exactly where we sit against the market.