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Company details

  1. Research and Product Development

Written by the company

RETApro is a UK-based supplier of research-grade Retatrutide (LY3437943), the investigational GLP-1 / GIP / glucagon triple receptor agonist, supplied strictly for laboratory and in-vitro research use. We do not sell it for human or veterinary use and we make no therapeutic claims. What sets us apart is verification. Every batch is independently tested by a named UK laboratory partner, PeptideVerify, using HPLC-UV, and each Certificate of Analysis carries a certificate ID that anyone can check against the laboratory's own record before ordering. Our current batch reports 98.0% purity. Prices are published per milligram so researchers can compare suppliers like for like. Our Retatrutide is made in the UK and supplied pre-mixed with bacteriostatic water in a multi-use pen, which removes the reconstitution step. Orders placed before 2pm on working days are dispatched the same day from UK stock, packed cold-chain (2-8°C) and sent by tracked Royal Mail Special Delivery, with delivery included in the price. Payment is by card or cryptocurrency. Support is by email and WhatsApp, Monday to Friday, 9am to 5pm. We also publish plain-English guides on Retatrutide's regulatory status in the UK, on how to evaluate a research peptide supplier, and a research library summarising the published clinical evidence, so buyers can make an informed decision. Retatrutide is not approved or licensed as a medicine by the MHRA or any other regulator. Everything we supply is for research purposes only.


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4.3

Excellent

TrustScore 4.5 out of 5

7 reviews

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1-star

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4.3

All reviews

(7)

7 reviews in the last 12 months

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Rated 5 out of 5 stars

Absolutely brilliant service from…

Absolutely brilliant service from Retapro! The whole ordering process was completely stress-free and straightforward. Customer service was excellent, and delivery was really quick too. I couldn’t fault the experience at all.
10/10 — would definitely recommend!

10 August 2026
Unprompted review
Rated 5 out of 5 stars

I’ve tried 3 types of Reta

I’ve tried 3 types of Reta, this is by far the most effective one yet and the cheapest too, I also really like how all the pens are slightly overfilled to allow for any mistakes/early pull outs, brilliant quality product.

11 August 2026
Unprompted review
Rated 5 out of 5 stars

100% works. Extremely happy. Have used RetaPro twice.

100% works.

I’ve used Reta Pro twice and couldn’t be happier.

After coming back from a long holiday around Italy I’d put on a considerable amount of weight.

I purchased from Reta Pro and used over 5 weeks at 2mg per week and dropped a considerable amount of weight. The product is so strong I didn’t even need to up my dosage like everybody else has said they have to - I know people taking 10mg a week using other products.

I then went away again and upon returning home did another 5 weeks at 2mg and in total lost nearly 3 stone over both courses.

I only had to buy one pen.

The quality of the product is exceptional, as is the customer service and customer care.

Extremely happy and recommend it to everyone.

31 May 2026
Unprompted review

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