P21 Price Comparison

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® , 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.