While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more

To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more

Company details

  1. Pharmaceutical Company

Written by the company

BioSupply UK is a UK-based supplier of research-grade peptides and reagents, built on a straightforward principle — the research community deserves access to compounds they can genuinely trust. Every product we supply is independently third-party lab tested and HPLC verified to 99%+ purity. We do not make claims we cannot back up. Certificates of Analysis are available on request for every batch, giving researchers full traceability from order to documentation. We stock a curated catalogue of research-grade peptides including metabolic compounds, recovery peptides, nootropics, anti-ageing compounds, and cosmetic research peptides. All products are supplied as lyophilised powder in sterile vials, stored and dispatched under appropriate conditions to maintain integrity from our facility to your door. We operate with same day dispatch on orders placed before our daily cut-off, with tracked UK delivery as standard. Our customer support team responds to all enquiries within 24 hours — whether you need documentation, have a question about a product, or want to discuss a wholesale order. BioSupply UK is a registered UK limited company. We supply exclusively to qualified researchers, laboratory professionals, and healthcare professionals. All products are for research purposes only and are not intended for human consumption or therapeutic use.


Contact info

3.5

Average

TrustScore 3.5 out of 5

4 reviews

5-star
4-star
3-star
2-star
1-star

Replied to 100% of negative reviews

Typically replies within 24 hours

How this company uses Trustpilot

See how their reviews and ratings are sourced, scored, and moderated.

Companies on Trustpilot aren't allowed to offer incentives or pay to hide reviews. Reviews are the opinions of individual users and not of Trustpilot. Read more

Rated 1 out of 5 stars

Day 7 update. Still zero effect across all three compounds — Retatrutide, Semax and Selank.

Day 7 update. Still zero effect across all three compounds — Retatrutide, Semax and Selank.

I run prescription Mounjaro and have a year's baseline on research Semax and Selank from other suppliers, so I know precisely what these feel like at dose. A full week in, full protocol, full doses: nothing. Not "subtle." Nothing.

On your points: I never disputed the COA was genuine — I disputed that it tests what you sold me. SN-RETA-B2601 ≠ BSUK002. You can call that "supply chain practice," but a Certificate of Analysis that doesn't carry my vial's batch number certifies nothing about my vial. That's the entire point of a batch number.

And you confirmed in writing the finished product wasn't independently tested until after I complained — while the site advertised "independently lab tested, 99%+ HPLC verified." That's the issue.

I'm documenting this day by day and will update as your "results published shortly" actually appear.

May 23, 2026
Unprompted review
BioSupply UK logo

Reply from BioSupply UK

Thank you for your continued update Chris. We note you have chosen to post multiple reviews on the same order.
For anyone reading this - the full context is as follows. This customer used the products over 4 days by their own admission and then requested a full refund whilst refusing to return any goods. As a gesture of goodwill we offered a full refund upon return of the products - a more than fair resolution. This offer was declined. The customer instead insisted on retaining the goods AND receiving a full refund simultaneously. No business - online or otherwise - operates on that basis.
Our independent lab results from the 19th May are due imminently and will be published publicly. We stand fully behind our products and look forward to sharing those results shortly.
We have served hundreds of customers across all three compounds mentioned - Retatrutide, Semax and Selank - with consistent positive feedback and returning customers. Our publicly verifiable Janoshik COA confirms 99.735% purity on the finished product.
BioSupply UK

Rated 5 out of 5 stars

Quick and works

Quick and works. No complaints here

May 12, 2026
Unprompted review
BioSupply UK logo

Reply from BioSupply UK

Thank you King — quick and works, that's all that matters! Really appreciate the review. 🧬
BioSupply UK

Rated 5 out of 5 stars

Wonderful service and received my order…

Wonderful service and received my order next day. Product as described so far! Will be back

May 20, 2026
Unprompted review
BioSupply UK logo

Reply from BioSupply UK

Thank you so much Ryan — next day delivery and product as described is exactly what we aim for every single time! We look forward to welcoming you back. 🧬
BioSupply UK

The Trustpilot Experience

Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.

Companies can ask for reviews via automatic invitations. Labeled Verified, they’re about genuine experiences.

Learn more about other kinds of reviews.

We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.

Learn about Trustpilot’s review process.

Here are 8 tips for writing great reviews.

Verification can help ensure real people are writing the reviews you read on Trustpilot.

Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.

Take a closer look