UK research peptide supplier checklist

1. The company

• A registered UK company: look the name up on the Companies House register and check the company number, registered office and status match what the website says.
• Check what the incorporation date means. A business can trade before it incorporates; a supplier should explain any gap plainly rather than imply a longer company history.
• A real contact route: a monitored email address and a named registered office. A registered office is a legal address, not necessarily a shop or lab.

2. Certificates of analysis

• A CoA for the specific lot you receive, not a generic certificate for the compound.
• The lot number on the CoA matches the lot number printed on your vial.
• The testing laboratory is named, and the report has a task or report number you can check with that lab.
• The CoA states the method (normally HPLC for purity, mass spectrometry for identity) and the date tested.
• See: how to read a CoA, and how to verify a CoA with the lab.

3. The vial and label

• A printed lot number on every vial.
• The compound name and the amount per vial (for example 10 mg) on the label.
• Clear research-use-only labelling. A supplier that markets products for human use, gives administration instructions or makes health claims is describing a medicine, which needs authorisation in the UK.

4. Price, stated honestly

• Compare like with like: the same compound and the same vial size. Price per mg is the fairest single figure.
• A dated comparison is more useful than an undated 'cheapest' claim. Ask when prices were last checked.
• Check what delivery costs and when it becomes free, so the total is comparable.

5. Dispatch, delivery and problems

• A stated dispatch cut-off and the working days it applies to.
• Tracked UK delivery, with the price for highlands and islands postcodes stated.
• A written policy for items that arrive faulty or damaged.

6. Payment

• A payment method that leaves a record and that you approve yourself, such as Pay by Bank through a regulated provider.
• Be cautious of requests to pay by untraceable methods.

How Sable answers each point

Sable Peptides Limited is a UK company (trading as Sable Peptides since 2019; incorporated 29 September 2026). Every vial carries a printed lot number and every lot has a CoA, emailed within 2 hours of a request. Prices are compared daily with other UK sellers. Orders paid by 15:00 on a working day are packed the same day. Payment is Pay by Bank via Wallid only. Faulty or damaged items are refunded or replaced.