--- title: "P21 UK Suppliers — 3 Verified Sellers (2026) - PeptideSupermarket®" description: "A directory of 3 verified UK P21 suppliers, with prices from £27.00, ratings, delivery times and lab-testing details compared side by side." url: "https://peptidesupermarket.co.uk/p21-uk-supplier" site: "PeptideSupermarket®" country: "United Kingdom" --- [Home](https://peptidesupermarket.co.uk) › [Peptides](https://peptidesupermarket.co.uk/compare-peptide-prices-uk) › [P21](https://peptidesupermarket.co.uk/peptide/p21) › P21 UK Suppliers The UK P21 Directory # P21 UK Suppliers Our directory of verified UK **P21** suppliers — 3 sellers compared on price (from **£27.00**), ratings, delivery speed and independent lab testing, so you can choose with confidence. 3 Listed suppliers £27.00 From ## Supplier listings 10mg dosage 01 [Alpha Peptides®](https://peptidesupermarket.co.uk/suppliers/alpha-peptides) ★5.0 (4) £27.00 [Visit supplier](https://peptidesupermarket.co.uk/go/01a08d33-9db5-7138-a458-9a38859ec8df?loc=keyword_price_table) 02 [Cobalt Peptides](https://peptidesupermarket.co.uk/suppliers/cobalt-peptides) ★5.0 (19) Est. 2026 1–3 day delivery Lab tested £75.95 [Visit supplier](https://peptidesupermarket.co.uk/go/01a0cfed-c6ab-7042-ac53-b1a4a09c40f4?loc=keyword_price_table) 03 [Genopept](https://peptidesupermarket.co.uk/suppliers/genopept) Est. 2026 1–2 day delivery Lab tested £27.00 [Visit supplier](https://peptidesupermarket.co.uk/go/01a0f557-d58d-7202-80d4-7103d829a28e?loc=keyword_price_table) ## Compare P21 by dosage | # | Supplier | Price | Per mg | Stock | Lab Tested | | | --- | --- | --- | --- | --- | --- | --- | | 1 | 95 Confidence [Alpha Peptides®](https://peptidesupermarket.co.uk/suppliers/alpha-peptides) Cheapest ★ 5.0 | £27.00 | £2.70 | In Stock | — | [View Deal](https://peptidesupermarket.co.uk/go/01a08d33-9db5-7138-a458-9a38859ec8df?loc=keyword_price_table) | | 2 | 90 Confidence [Cobalt Peptides](https://peptidesupermarket.co.uk/suppliers/cobalt-peptides) ★ 5.0 | £75.95 | £7.60 | Out of Stock | — | [View Deal](https://peptidesupermarket.co.uk/go/01a0cfed-c6ab-7042-ac53-b1a4a09c40f4?loc=keyword_price_table) | | 3 | 50 Confidence [Genopept](https://peptidesupermarket.co.uk/suppliers/genopept) | £27.00 | £2.70 | In Stock | — | [View Deal](https://peptidesupermarket.co.uk/go/01a0f557-d58d-7202-80d4-7103d829a28e?loc=keyword_price_table) | ## Price history ### 30-Day P21 Price Trend Based on the 10mg dosage — cheapest, average & highest listed price. Cheapest Average Highest £76 £51 £27 28 Sep 12 Oct 27 Oct 30-Day Low £27.00 Average £29.18 30-Day High £75.95 ## Choosing a P21 supplier in the UK There are 3 UK suppliers stocking P21 in our directory, with 10mg prices from **£27.00** up to **£75.95** (average **£43.32**). [Alpha Peptides®](https://peptidesupermarket.co.uk/suppliers/alpha-peptides) is the keenest on price today at roughly £2.70/mg, but the cheapest supplier isn't always the right one — delivery, testing and reputation matter just as much. ## What makes a good P21 supplier We'd shortlist suppliers that offer: - **Third-party lab testing** — an independent certificate of analysis for every batch. - **UK-based dispatch** — faster delivery, no customs delays and easier returns. - **Transparent pricing** — clear per-vial and per-mg costs with no surprises at checkout. - **Verified reviews** — a track record from real customers you can actually check. - **Clear policies** — upfront shipping times, payment options and refund terms. ## How much do UK P21 suppliers charge? Expect to pay around **£43.32** for the 10mg dosage, dropping to **£27.00** with the best-value supplier and rising to **£75.95** at the top end — a spread of roughly **64%** across the directory. Each listing above links to the supplier's full profile with their delivery, payment and testing details. ## Buying from a P21 supplier safely Research peptides are supplied for in-vitro laboratory use only. Favour established suppliers with verified reviews and independent testing, and ensure any purchase complies with the law in your jurisdiction. > For in-vitro laboratory research use only. We compare suppliers — we don't sell, supply or ship P21 or any other peptide. ### More ways to buy P21 - [P21 full price comparison](https://peptidesupermarket.co.uk/peptide/p21) - [Best P21 Prices](https://peptidesupermarket.co.uk/best-p21-prices) - [Cheapest P21 Prices](https://peptidesupermarket.co.uk/cheapest-p21-prices) - [Where to Buy P21](https://peptidesupermarket.co.uk/where-to-buy-p21) - [Buy P21 Online UK Cheap](https://peptidesupermarket.co.uk/buy-p21-online-uk-cheap) - [P21 Price Comparison](https://peptidesupermarket.co.uk/p21-price-comparison) - [P21 For Sale](https://peptidesupermarket.co.uk/p21-for-sale) ### Compare prices for other peptides - [Retatrutide](https://peptidesupermarket.co.uk/retatrutide-uk-supplier) - [GHK-Cu](https://peptidesupermarket.co.uk/ghk-cu-uk-supplier) - [BPC-157](https://peptidesupermarket.co.uk/bpc-157-uk-supplier) - [NAD+](https://peptidesupermarket.co.uk/nad-uk-supplier) - [Mots-C](https://peptidesupermarket.co.uk/mots-c-uk-supplier) - [Tirzepatide](https://peptidesupermarket.co.uk/tirzepatide-uk-supplier) ## Compare every P21 deal in one place Live prices from verified UK suppliers, updated continuously. Find the cheapest P21 in seconds. [View P21 Comparison](https://peptidesupermarket.co.uk/peptide/p21) [Browse All Peptides](https://peptidesupermarket.co.uk/compare-peptide-prices-uk) --- *Add `.md` to any page URL on peptidesupermarket.co.uk for its Markdown version. Index of the site: https://peptidesupermarket.co.uk/llms.txt - full text: https://peptidesupermarket.co.uk/llms-full.txt.*