An independent look at purity standards, COA availability, and UK dispatch across the main suppliers of research peptides in the United Kingdom.
All peptides are sold for in-vitro research and laboratory use only. Not intended for human or animal administration.
Competitors are labelled A–D to present information fairly without making unverifiable specific claims about other companies.
| Supplier | HPLC Purity | COA per Batch | UK Dispatch | Catalogue Size | Notes |
|---|---|---|---|---|---|
| Peptify UK | 99%+ | 56 | Independent third-party HPLC + MS per batch. UK same-day dispatch. Batch-specific COA downloadable from every product page. | ||
| Supplier A | 98%+ | Partial | 40–60 | COAs available on request; not always batch-specific. Ships from outside UK. | |
| Supplier B | 98–99% | Partial | 50+ | Purity specification listed on product pages; independent verification not confirmed. EU dispatch. | |
| Supplier C | 95%+ | 30–50 | Lower stated purity specification. COA availability inconsistent. International shipping only. | ||
| Supplier D | 98%+ | Partial | 20–40 | UK dispatch available; smaller catalogue. COAs not available for all products. |
Data based on publicly available information. Supplier positions may change. Always verify independently before procurement.
Peptify UK pricing for the five most-researched peptides. All prices include a batch-specific COA and UK same-day dispatch.
| Peptide | Size | Price | Price/mg | HPLC |
|---|---|---|---|---|
| BPC-157 | 10mg | £39.99 | £4.00/mg | 99%+ |
| TB-500 | 10mg | £44.99 | £4.50/mg | 99%+ |
| GHK-Cu | 100mg | £59.99 | £0.60/mg | 99%+ |
| Ipamorelin | 10mg | £34.99 | £3.50/mg | 99%+ |
| Retatrutide | 10mg | £59.99 | £6.00/mg | 99%+ |
BPC-157
from £34.99
TB-500
from £39.99
GHK-Cu
from £29.99
NAD+
from £44.99
Ipamorelin
from £29.99
MOTS-C
from £49.99
Retatrutide
from £54.99
CJC-1295
from £29.99
Epithalon
from £24.99
Semax
from £29.99
The COA should be issued for the specific batch number on your vial. Generic or undated certificates offer weaker assurance.
Third-party testing by an accredited laboratory unaffiliated with the supplier removes the conflict of interest in self-reported purity figures.
The research community standard is 99%+ HPLC purity. Compounds below this threshold may contain synthesis by-products that affect experimental outcomes.
UK-based stock means orders are dispatched without international customs delays and are less exposed to temperature excursions during long transit.
HPLC measures purity; mass spectrometry confirms identity. A complete COA includes both, ruling out substitution or mis-labelling.
Request a batch-specific Certificate of Analysis (COA) before purchase. The COA should be produced by an independent third-party laboratory and should state the HPLC purity percentage and the mass spectrometry molecular weight confirmation. A generic or undated COA provides less assurance than a per-batch document.
The research community generally considers 99%+ HPLC purity the standard for high-quality research peptides. Lower purity grades (95–98%) may contain higher levels of synthesis by-products or truncated sequences, which can affect experimental reproducibility.
Orders placed before the daily cut-off are dispatched from a UK warehouse the same working day. Same-day dispatch means the compound does not need to pass through international customs, reducing lead time and the risk of temperature excursions during transit.
Independent testing by a third-party laboratory means the purity result is not self-reported by the manufacturer. An independent COA provides greater confidence that the stated purity reflects the actual composition of the compound.
Most research peptides sold for in-vitro laboratory use are legal to purchase in the UK. They are not classified as medicines and are not approved for human consumption. Buyers should verify the current regulatory status of any specific compound before procurement.
The most frequently researched peptides in the UK include BPC-157 (tissue repair), TB-500 (cell migration), GHK-Cu (collagen synthesis), NAD+ (cellular energy), Ipamorelin (GH secretagogue), MOTS-C (metabolic regulation), and Retatrutide (triple receptor agonist). Peptify UK stocks all of these with COA per batch.
UK same-day dispatch. Every batch ships with a downloadable Certificate of Analysis on the product page.
Browse Research PeptidesFor in-vitro research and laboratory use only.