--- title: "Buy P21 UK | from £26.93 | Sable Peptides" description: "Buy P21 in the UK from £26.93: 5 mg, 10 mg vials, packed same day for next-day delivery, Certificate of Analysis for every lot. Research use only." canonical: https://www.sablepeptides.co.uk/buy/p21 dateModified: 2026-10-16 publisher: Sable Peptides Limited (UK company 17488610) note: Research use only. Not for human or veterinary use. --- [Buy in the UK](/buy) / Short sequences # Buy P21 in the UK ## Sizes and live prices | Vial | Price | Per mg | Stock | Lowest other UK listing (16 Oct 2026) | | --- | --- | --- | --- | --- | | P21 5 mg | £26.93 | £5.39 | In stock | No same-size comparison | | P21 10 mg | £26.98 | £2.70 | In stock | No same-size comparison | Prices from the live catalogue. Comparison from the daily UK price check of 30 established UK suppliers; named sellers in the table above. ## Delivery, CoA and payment - Packed the same day in Birmingham; next-day UK delivery is the stated service. - UK mainland tracked delivery £5.90, free when goods reach £50. Highlands and islands (AB, IV, KW, HS, ZE, PH) £9.50, free when goods reach £50. UK addresses only. - A Certificate of Analysis (HPLC purity and mass spectrometry identity) for every lot, emailed within 2 hours of a request. Each vial carries a printed lot number. - Lowest UK price guaranteed for the same compound and mg size, checked daily against established UK suppliers. - Pay by Bank via Wallid. No returns, except faulty or damaged items, which are refunded or replaced. - Research use only. Not a medicine. Not for human or veterinary use. ## UK buyer's guide: P21 Practical checks for a laboratory ordering P21 in the UK. Research use only: this guide gives no administration amount, no administration method and no health claim. ### 1\. What to check on a P21 certificate of analysis - Compound and amount: the CoA should name P21 and the stated amount of the vial you received (5 mg, 10 mg in this catalogue). - Lot number: the lot on the CoA must match the lot printed on the vial label, character for character. - HPLC purity: a percentage with the chromatogram, the column and the detection wavelength. The batch-release specification is HPLC ≥99%. - Mass-spectrometry identity: the observed mass next to the theoretical mass for the sequence. They should agree within the method's tolerance. - Dates and lab: the test date and the testing laboratory. A CoA with no lot, no date or no chromatogram is not a lot certificate. [How to read an HPLC chromatogram](/learn/how-to-read-an-hplc-chromatogram) · [About Sable certificates](/certificate-of-analysis) ### 2\. Verify the lot number Enter the lot printed on your vial at [/lot-lookup](/lot-lookup). If the lot is not listed yet, request the certificate at [/coa-request](/coa-request) and it is emailed within 2 hours. Keep the CoA with your lab records for that lot. ### 3\. Storage on arrival P21 ships as lyophilised powder in a sealed vial at ambient temperature. On arrival, log the lot and date received, keep the vial sealed and labelled, and store and handle it according to your own laboratory SOP and the compound's safety data. Sable does not give reconstitution or administration instructions. ### 4\. UK delivery times - Order and pay by 15:00 UK time on a working day: packed the same day in Birmingham, delivered the next working day. - After the cut-off, at weekends or on bank holidays: packed on the next working day. - Postage £5.90 UK mainland or £9.50 highlands and islands (AB, IV, KW, HS, ZE, PH); free when goods reach £50. All orders are tracked. See [shipping](/shipping). ### 5\. Multi-buy prices Buying several vials of the same size: 3 or more save 10%, 5 or more save 15%, 10 or more save 20%. Applied automatically at checkout. Single-vial prices are unchanged. | Size | 1–2 vials | 3+ (−10%) | 5+ (−15%) | 10+ (−20%) | | --- | --- | --- | --- | --- | | 5 mg | £26.93 | £24.24 | £22.89 | £21.54 | | 10 mg | £26.98 | £24.28 | £22.93 | £21.58 | Price per vial at each quantity, from the live catalogue price. ### 6\. How prices are checked Every day Sable reads the public, in-stock, single-vial listings of established UK research-peptide suppliers (30 sellers in the latest run) and compares the same compound at the same mg size, prices as listed excluding postage. Latest check: 16 Oct 2026. No other UK seller listed P21 in stock at a matching size in the latest check. [Daily UK price check](/uk-price-check) · [Methodology](/data/methodology) ## Compare P21 - [P21 compared with similar research compounds](/versus/p21) - [P21 in the UK peptide price index (Sable vs cheapest named seller)](/uk-peptide-price-index#p21) - [P21 UK hub: lot data, certificates and full Q&A](/p21-uk) ## Questions Where can I buy P21 in the UK? Sable Peptides sells P21 online from £26.93 at https://www.sablepeptides.co.uk/p21-uk, for laboratory research use only. Delivery is to UK addresses only. Can I get P21 with next-day delivery in the UK? Yes. Orders are packed the same day in Birmingham and next-day UK delivery is the stated service. UK mainland tracked delivery is £5.90, free when goods reach £50. Does P21 come with a certificate of analysis? Yes. Every P21 lot has a Certificate of Analysis (HPLC purity and mass spectrometry identity). Request it with your lot or order number at https://www.sablepeptides.co.uk/coa-request and it is emailed within 2 hours. How much is P21 in the UK? 5 mg: £26.93; 10 mg: £26.98. Prices are list prices including VAT, excluding delivery. Is P21 for human use? No. It is sold for laboratory research use only. It is not a medicine and not for human or veterinary use. ## Related - [P21 UK: all sizes](/p21-uk) - [P21 certificate of analysis](/certificate-of-analysis/p21) - [P21 UK price check](/uk-price-check/p21) - [P21 price per mg](/price-per-mg/p21) - [Cheapest P21 10 mg UK](/questions/p21/cheapest-p21-10-mg-uk) - [Best P21 supplier UK](/best-uk-supplier/p21) - [What P21 is](/learn/p21) - [P21 compared with other compounds](/versus/p21) - [UK delivery](/shipping) - [Request a CoA](/coa-request) Researchers comparing peptide lots often start with [Adamax](/adamax-uk), then look at the reproductive-axis reference peptides [Kisspeptin-10](/kisspeptin-10-uk) and [Gonadorelin](/gonadorelin-uk), and [Oxytocin](/oxytocin-uk). For the triple-agonist analogue, the [Retatrutide in the UK](/retatrutide-uk) sets out UK supply and certificates. Everything is listed in [the full research catalogue](/catalogue); orders are packed in [Birmingham, our dispatch city](/locations/birmingham) (start again from [the Sable Peptides home page](/)). Research use only. You can buy P21 in the UK from Sable Peptides from £26.93, in 5 mg, 10 mg vials (2 of 2 in stock). Orders are packed the same day in Birmingham for next-day UK delivery. Every lot has a Certificate of Analysis, emailed within 2 hours of a request. Research use only. Updated 2026-10-16