PeptidesUK Review: London Supplier, COAs on Request and Royal Mail Delivery

PeptidesUK is a London research peptide supplier that says it has been trading since 2012. It sells freeze-dried peptides, combination packs and a mixing solution to UK laboratories, universities and independent researchers, and it ships within the UK and abroad.

We looked at the homepage, the catalog, a product page, the Lab Reports page, the FAQ, the delivery and payment pages, the terms and parts of the blog. The supplier is open about delivery and payment, but less open about its test reports, which buyers have to request.

Who PeptidesUK is and what the catalog covers

The supplier lists a street address in London N1 and office hours of 9am to 5pm, Monday to Friday. Its About page says products are made in a cGMP-compliant, ISO 9001-certified facility, but the manufacturer is not named.

The peptide catalog holds about 36 items, three of them out of stock at the time of review. Most are single peptides in small vial sizes, alongside NAD+, which the site marks as a non-peptide, and a mixing solution. Listed prices run from £9.95 to £49.95, and combination packs are sold on a separate page.

Lab reports and certificates: available on request

The FAQ says all peptides are HPLC-tested for purity, and product pages describe them as HPLC and MS verified, with MS-UPLC named in places. The About page states a 99% purity minimum, or 98% for complex sequences, and refers to third-party lab reports.

The reports themselves are not published. The Lab Reports page lists 38 product entries, each with a button that opens a contact form with a COA request subject line. The FAQ confirms that certificates are sent on request with an order number.

• No named lab. Neither the reports page nor the product pages identify the testing laboratory.
• No visible MS data. Mass spec is claimed, but no observed mass appears anywhere on the site.
• Inconsistent figures. The BPC-157 page gives both 98% and 99% purity figures in different sections.

Ask for the report before ordering, and check that it names a lab and a batch number you can match to your vial.

Labeling and purchase checks

Every listing carries an in vitro research-only notice, and an entry gate asks visitors to confirm they are 18 or older and accept that products are not for human or veterinary use. The terms limit buyers to trained laboratory professionals and require accurate research-use declarations at checkout.

The site also runs a blog and handling and storage guides. Some blog posts summarize animal and cell study findings for specific compounds, and product pages show customer reviews about product performance. Both carry disclaimers, but that content goes further than strict research-use labeling.

Ordering, delivery and handling in transit

Payment options include bank transfer, Pay by Bank through an FCA-authorized open banking provider, Bitcoin, and card payment in some countries by an emailed secure link. Orders paid before 2pm ship the same weekday from UK stock.

The delivery page sets out Royal Mail services:

• Tracked 24 in the UK, 1 to 2 working days, free over £75
• Special Delivery, next working day by 1pm, free over £150
• Tracked and Signed to Europe (3 to 5 working days) and worldwide (5 to 7 working days), free over £200

Parcels are tracked and packed without outer markings. Cold packs are not mentioned, and the Special Delivery price is stated two different ways on the same page.

Refunds, reships and support

Returns are not accepted, since the supplier treats peptides as perishable. The FAQ asks buyers to report damaged, wrong or faulty items within 7 days of receipt and says statutory rights for faulty goods still apply. It does not spell out whether such cases get a refund or a reship.

For lost parcels, the FAQ says support will help with tracking and may open an investigation. Customs seizures are at the buyer's risk; if customs returns a parcel, the terms allow a reship or a refund minus a 50% restocking fee. Support works through email and an online help center during office hours.

Verdict: who it suits and what to check first

PeptidesUK suits UK labs that want fast domestic dispatch, clear delivery options and a long-running supplier. It is a weaker fit for buyers who need published, named-lab reports with mass spec data before they order.

• Request the COA for your product and batch before paying.
• Check that the report names a lab and a batch number you can confirm with that lab.
• For orders outside the UK, read the customs terms first.