Buy Research Peptides UK: Lyophilised Vials, Prices & Published COAs
For in-vitro laboratory research use only. Not for human or veterinary use. Corex Vitality™ supplies research compounds to adults (18+) for laboratory research. Nothing on this page is medical advice.
Corex Vitality™ is a UK supplier of lyophilised research peptides for in-vitro laboratory work. This page brings together our current research range, UK prices, and the Certificate of Analysis (COA) published for each compound, so you can check the paperwork before you order.
Five checks before you buy research peptides in the UK
Is a COA published before checkout? Every COA we hold is open to view on our COA verification page, with no login.
Does the COA name the laboratory and a report number? You should be able to check the report with the lab itself. Our guide to verifying a peptide COA walks through this using a Lingda Laboratory report.
Does the COA match the compound and size? Some sizes share a COA from another size of the same compound. We say so in the table below.
What tests are actually shown? Most of our COAs report HPLC purity and quantity, plus heavy metals, endotoxin and sterility. Read HPLC purity vs net peptide content for what a purity figure does and does not tell you.
Is there a real UK company behind the site? Corex Vitality™ is the trading name of The Peptide Corex Limited, Company No. 17461435, ICO registration ZC282346. See our trusted peptide companies UK checklist for the full supplier checklist.
Research range, UK prices & COAs
Prices below are per vial for sizes in stock, taken from our store and updated whenever a price or stock level changes. The product page shows the same price and stock.
Currently out of stock: Epitalon, MOTS-c, SS-31, FOXO4-DRI. Their product pages show COA details and restock status.
Also in stock: PT-141, Klow-80. Their product pages show the current price and COA details.
About the GLP-1 and incretin receptor compounds
Retatrutide, Tirzepatide, Semaglutide and Cagrilintide are supplied as research compounds for receptor and signalling studies in vitro. They are not the licensed medicines that share these names, and they are not for human use. For background on the receptors involved, read GLP-1, GIP & glucagon receptor peptides explained.
Retatrutide research pens
Corex Vitality™ currently lists one research pen: the Retatrutide Pen, in 20mg (£124.99) and 40mg (£159.99). Pens are prepared to order from in-stock lyophilised Retatrutide and take 2 days to prepare before dispatch. Multi-Pen Savings apply automatically: £10 off 2 pens and £25 off 3 or more. The COA shown for a pen is the published COA for the lyophilised compound; the pen solution is not separately tested. Not for human or veterinary use.
Multi-Vial Savings: 10% off 2 vials, 15% off 3 or more, applied automatically in the basket.
Delivery: free next-day tracked delivery on in-stock orders over £50. See Shipping Information for dispatch times.
Laboratory solvent:BAC Water is available in 3ml (£3.99) and 10ml (£5.99). 10ml BAC Water can be added for £5.99 with any lyophilised peptide, and it is free on orders over £100.
Published research (in-vitro, receptor and analytical studies)
References verified against PubMed via NCBI E-utilities on 29 October 2026. They describe laboratory research only and are not claims about any product sold here.
Chang CH, Tsai WC, Hsu YH, Pang JH. Pentadecapeptide BPC 157 enhances the growth hormone receptor expression in tendon fibroblasts. Molecules. 2014;19(11):19066-77. PMID: 25415472. DOI: 10.3390/molecules191119066. In-vitro study using fibroblasts isolated from rat Achilles tendon. cDNA microarray analysis identified growth hormone receptor among the most up-regulated genes after BPC-157 exposure, confirmed at mRNA and protein level in cultured cells.
Willard FS, Douros JD, Gabe MB, et al. Tirzepatide is an imbalanced and biased dual GIP and GLP-1 receptor agonist. JCI Insight. 2020;5(17):e140532. PMID: 32730231. DOI: 10.1172/jci.insight.140532. Receptor pharmacology study in cell systems: tirzepatide shows an imbalanced activity profile favouring the GIP receptor and, at the GLP-1 receptor, favours cAMP signalling over β-arrestin recruitment (biased agonism).
Mehr A, Henneberg F, Chari A, Görlich D, Huyton T. The copper(II)-binding tripeptide GHK, a valuable crystallization and phasing tag for macromolecular crystallography. Acta Crystallogr D Struct Biol. 2020;76(Pt 12):1222-1232. PMID: 33263328. DOI: 10.1107/S2059798320013741. Structural chemistry study: the high-affinity copper(II)-binding tripeptide GHK was fused to test proteins, where it aided crystallisation and allowed copper-based phasing, describing the square-pyramidal copper coordination of GHK.
Safer D, Elzinga M, Nachmias VT. Thymosin beta 4 and Fx, an actin-sequestering peptide, are indistinguishable. J Biol Chem. 1991;266(7):4029-32. PMID: 1999398. Biochemistry study showing thymosin β4 forms a 1:1 complex with actin monomers (G-actin) and inhibits actin polymerisation in vitro; TB-500 is a synthetic fragment-related peptide studied in this context.
D’Hondt M, Bracke N, Taevernier L, et al. Related impurities in peptide medicines. J Pharm Biomed Anal. 2014;101:2-30. PMID: 25044089. DOI: 10.1016/j.jpba.2014.06.012. Review of peptide-related impurities from solid-phase synthesis and degradation (e.g. deletion and insertion sequences, oxidation, deamidation, racemisation) and how chromatographic methods are used to detect them.
Frequently asked questions
Where can I buy research peptides in the UK?
Corex Vitality™ supplies lyophilised research peptides from UK stock with published Certificates of Analysis, for in-vitro laboratory research only. Before buying from any supplier, check that batch COAs are published before checkout and can be checked with the issuing laboratory.
Are your products tested?
Yes, the published COAs report HPLC purity and quantity, and the Lingda Laboratory COAs also report heavy metals (ICP-MS), endotoxin (LAL) and sterility results. Testing was commissioned by the manufacturer or supplier, and COAs are published exactly as the laboratory issued them. Not every size has its own COA, so check the COA for the size you are ordering.
Do your COAs include mass spectrometry?
Only one published COA, MOTS-c 10mg from Bio-Analysis Centre, includes an LC-MS identity check. The other COAs report HPLC purity and the additional tests shown on each certificate.
How much do I save on multiple vials?
Multi-Vial Savings apply automatically in the basket: 10% off 2 vials and 15% off 3 or more.
Can these products be used in people or animals?
No. All products are for in-vitro laboratory research use only. Not for human or veterinary use.
All products supplied by Corex Vitality™ (the trading name of The Peptide Corex Limited, Company No. 17461435, ICO ZC282346, 5 Brayford Square, London E1 0SG) are research chemicals for in-vitro laboratory research only. They are not medicines, food, food supplements or cosmetics. Not for human or veterinary use. Published studies are cited to describe laboratory and receptor-level research only and are not claims about any product sold here.
Research you can verify.
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Research-grade peptides supplied exclusively for in-vitro laboratory research, supported by third-party HPLC testing and transparent batch documentation. Not for human or veterinary use.
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