--- title: "P21 Price Comparison — 3 UK Suppliers (October 2026) - PeptideSupermarket®" description: "Live P21 price comparison across 3 UK suppliers, from £27.00 to £75.95 (avg £43.32). Per-mg pricing and 30-day history." url: "https://peptidesupermarket.co.uk/p21-price-comparison" 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 Price Comparison Price Index / P21 | 27 Oct 2026 # P21 Price Comparison A live **P21** price index across 3 UK suppliers — currently ranging from **£27.00** to **£75.95**, averaging **£43.32**. Every figure is normalised to the 10mg dosage for a true like-for-like comparison. Cheapest £27.00 Alpha Peptides® Average £43.32 10mg Highest £75.95 Cobalt Peptides Indexed sellers 3 live short); ?> suppliers Price spread £27 avg £43 £76 ## // 30-day trend ### 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 ## // Live order book | # | 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) | ## // Top-ranked sellers [Alpha Peptides®](https://peptidesupermarket.co.uk/suppliers/alpha-peptides) Best Price 95/100 £27.00 10mg - ★ 5.0 (4 reviews) [View profile](https://peptidesupermarket.co.uk/suppliers/alpha-peptides) [View deal](https://peptidesupermarket.co.uk/go/01a08d33-9db5-7138-a458-9a38859ec8df?loc=keyword_spotlight) [Cobalt Peptides](https://peptidesupermarket.co.uk/suppliers/cobalt-peptides) Runner-up 90/100 £75.95 10mg - ★ 5.0 (19 reviews) - Trading since 2026 - 1–3 day UK delivery - Lab tested by Janoshik [View profile](https://peptidesupermarket.co.uk/suppliers/cobalt-peptides) [View deal](https://peptidesupermarket.co.uk/go/01a0cfed-c6ab-7042-ac53-b1a4a09c40f4?loc=keyword_spotlight) [Genopept](https://peptidesupermarket.co.uk/suppliers/genopept) Also worth a look 50/100 £27.00 10mg - Trading since 2026 - 1–2 day UK delivery - Lab tested by Puralytix [View profile](https://peptidesupermarket.co.uk/suppliers/genopept) [View deal](https://peptidesupermarket.co.uk/go/01a0f557-d58d-7202-80d4-7103d829a28e?loc=keyword_spotlight) ## How our P21 price comparison works We index live P21 listings from 3 verified UK suppliers and convert each one to a per-milligram figure for the 10mg dosage, so you're always comparing like for like. As of October 2026, the cheapest listing is **£27.00** (£2.70/mg) from [Alpha Peptides®](https://peptidesupermarket.co.uk/suppliers/alpha-peptides), the average is **£43.32**, and the highest is **£75.95** from Cobalt Peptides. ## Reading the P21 price spread The spread between the cheapest and most expensive P21 listing is about **64%**. A wide spread means it genuinely pays to shop around; a narrow one means the market has settled and most sellers are competitive. The spread bar and order book above update continuously as suppliers change their pricing. ## What moves the P21 price? - **Dosage size** — larger 10mg vials usually carry a lower per-mg cost. - **Lab testing** — independently tested product typically commands a small premium. - **Shipping** — free-delivery thresholds can flip which supplier is truly cheapest once postage is added. - **Discount codes** — checkout codes can move a listing several places up the ranking. ## Tracking P21 prices over time The 30-day chart plots the cheapest, average and highest P21 price each day. Use it to judge whether today's **£27.00** is a genuine low or just the current going rate, and to time your order around the dips. > For in-vitro laboratory research use only. We're a price-comparison service and do not sell, supply or ship P21. ### 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 UK Supplier](https://peptidesupermarket.co.uk/p21-uk-supplier) - [P21 For Sale](https://peptidesupermarket.co.uk/p21-for-sale) ### Compare prices for other peptides - [Retatrutide](https://peptidesupermarket.co.uk/retatrutide-price-comparison) - [GHK-Cu](https://peptidesupermarket.co.uk/ghk-cu-price-comparison) - [BPC-157](https://peptidesupermarket.co.uk/bpc-157-price-comparison) - [NAD+](https://peptidesupermarket.co.uk/nad-price-comparison) - [Mots-C](https://peptidesupermarket.co.uk/mots-c-price-comparison) - [Tirzepatide](https://peptidesupermarket.co.uk/tirzepatide-price-comparison) ## 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.*