Best of 2026 · Research peptides
Best UK Sermorelin retailers
Oliver Mackman · Editorial director · Best Business Loans Ltd (16833937)
Last updated 2026-05-20
Six UK and UK-shipping research peptide retailers ranked on Sermorelin availability, HPLC purity, Certificate of Analysis transparency, and UK delivery speed. Sermorelin is a 29-amino-acid GHRH analogue (Geref was the original branded medicine, withdrawn in the US in 2008). No UK marketing authorisation as a medicine in 2026.
| # | Retailer | Purity | CoA | Delivery | Notes |
|---|---|---|---|---|---|
| 1 | my-peptides my-peptides.co.uk | 99%+ HPLC | Provided with order | UK next-day | Stock typically reliable on Sermorelin 5mg vials. Strongest UK customer support. |
| 2 | Pure Peptides UK purepeptides.co.uk | 99%+ HPLC | On request | UK next-day | Long-established UK operator. Strong GHRH-analogue range. |
| 3 | Nooku nooku.io | HPLC | Provided | UK + EU | CoA documentation is strong. |
| 4 | Direct Sarms direct-sarms.com | HPLC verified | On request | UK + international | Wider catalogue with SARMs alongside. |
| 5 | Aquila Peptides aquilapeptides.com | HPLC verified | On request | UK + EU | Smaller specialist range. |
| 6 | Pinnacle Peptides pinnaclepeptides.uk | HPLC | On request | UK only | UK-only delivery. |
Editorial summary, May 2026.
Sermorelin vs Ipamorelin context
Sermorelin is a GHRH analogue; Ipamorelin is a GHRP (acts at the ghrelin receptor). Different mechanisms, often paired in the preclinical literature. UK retailer pricing on Sermorelin tends to be higher than Ipamorelin because of the longer 29-amino-acid peptide synthesis cost.
Background: Sermorelin encyclopedia entry.
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