Cart is empty - 99%+ HPLC Purity
- Every Batch Tested
- COA Available On Request
- Made Fresh to Order with Next Day Post
- Royal Mail 24hr Tracked
- Cold Chain Packaged
Premium Quality Research Products from
cosipep
High-purity research peptides manufactured and dispatched from the United Kingdom. Every batch independently verified to 99%+ HPLC purity with full certificate of analysis available on request.
99% HPLC Purity
Every batch tested
Freshly Made to Order
Next day despatched
Royal Mail 24hr Tracked
Cold chain packaged
NAD+ 1000mg
Price range: 38.00£ through 62.00£ Select options This product has multiple variants. The options may be chosen on the product pageIPAMORELIN 10mg
Price range: 32.00£ through 255.00£ Select options This product has multiple variants. The options may be chosen on the product pageKLOW 80mg
Price range: 59.00£ through 471.00£ Select options This product has multiple variants. The options may be chosen on the product pageGHK-Cu 100mg
Price range: 29.00£ through 231.00£ Select options This product has multiple variants. The options may be chosen on the product pagePremium Research Products
Premium Research Products
Every compound is rigorously tested and certified to the highest purity standards before dispatch. No compromises.
Unmatched Customer Service
Dedicated UK-based support team — real people, fast responses, expert guidance for your research needs.
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Why Researchers Choose
Cosipep
Peptides are an area of growing interest within scientific and laboratory research communities. Current studies focus on their structural properties and potential roles in biological and biochemical research settings. Beyond academic and experimental research, peptides are also explored in broader scientific fields related to ageing and cellular research.
When purchasing peptides online in the UK, it is important to select a reputable supplier that provides laboratory-grade products, verified purity, and clear documentation. All peptides should be supplied strictly for research and laboratory use only and not for human or veterinary consumption.
- Dedicated UK-based customer support
- Strictly for research use — full documentation
- Not for Human or Animal use
VIP List Access
Exclusive member pricing
Dedicated Support
UK-based expert team
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Research Community
3,100+ active researchers
Researcher Reviews
Trusted by the UK Research Community
Real feedback from qualified UK researchers, scientists and institutions who trust Cosipep peptides for their laboratory compounds.
4.9★
Avg. Rating
3,100+
UK Researchers
98%
Would Recommend
100%
Reorder Rate
We ran our own HPLC verification on the Retatrutide 5mg batch — came back at 99.4%, exactly matching the COA provided. Packaging arrived fully sealed via Royal Mail Tracked, next working day. Cosipep Peptides has genuinely set a new standard for UK research compound suppliers. This is now our laboratory's exclusive source.
Ordered BPC-157 10mg and TB-500 together. The COA was available immediately on the website — exactly what we need for our research documentation. Arrived next day, perfectly lyophilised. Outstanding quality and service.
The Tesamorelin came with documentation I've never seen from another UK supplier — detailed mass spec alongside the HPLC trace. British Peptides clearly invests in proper QC. VAT inclusive pricing with no surprises at checkout. Repeat customer without question.
We ran our own HPLC verification on the Retatrutide 5mg batch — came back at 99.4%, exactly matching the COA provided. Packaging arrived fully sealed via Royal Mail Tracked, next working day. Cosipep Peptides has genuinely set a new standard for UK research compound suppliers. This is now our laboratory's exclusive source.
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