Peptides UK
Research peptide capsules UK: BPC-157, BPC-150, TB-500, Ipamorelin and IGF-1 LR3 from Free Muscle and three partner brands. Research use only, 18+.
Last reviewed · prices and listings checked by Free Muscle
This collection lists the peptide research compounds we sell and dispatch from the UK. Free Muscle's own label covers BPC-150, TB-500 (Thymosin Beta-4), Ipamorelin, IGF-1 LR3 and Retatrutide; through Muscle Market we add BPC-157 and TB-500 capsules from BioLab, Thoroughbred Labs and Yakka Strength. All are supplied as capsules, 60 per pack, for laboratory research. Every Free Muscle batch is assayed by Janoshik Analytical, an independent laboratory, and the Certificate of Analysis for your batch is available on request; for other brands we show a certificate only where the manufacturer supplies one for the batch we hold. None of these is a licensed medicine or a food supplement.
What this collection covers
Peptides are short chains of amino acids. The ones here range from synthetic fragments of human proteins to engineered hormone analogues. Each has its own page with the published research, the brands we hold and how to compare them.
- BPC-150, Free Muscle's own-label listing, supplied as 1000 mg capsules; the collection page explains how it relates to the BPC-157 literature.
- TB-500 (Thymosin Beta-4), a synthetic form of a 43-amino-acid protein present in most human cells, studied mainly in animal wound models.
- Ipamorelin, a pentapeptide growth hormone secretagogue that acts at the ghrelin receptor, which reached early clinical study and was not developed further.
- IGF-1 LR3, a long-arginine-3 analogue of insulin-like growth factor 1 used in cell culture research.
- Retatrutide (LY3437943), a GIP, GLP-1 and glucagon receptor triple agonist currently in late-stage clinical trials and not approved anywhere.
Other brands' BPC-157 and TB-500 capsules, listed through Muscle Market, appear in the grid above, with a certificate shown only where the manufacturer supplies one for the batch we hold.
A note on capsule peptides
Peptides are usually studied by injection because the gut breaks proteins down. The capsule format here is a matter of handling convenience for laboratory work, not a claim of oral activity. Our article Do Oral Peptides Actually Work? sets out what the literature does and does not show.
What the published research reports
The evidence base varies widely by compound. Retatrutide has the strongest human data: in a 48-week phase 2 trial of 338 adults with obesity, mean weight change ranged from about 8 to 24 per cent depending on dose, against about 2 per cent on placebo, with gastrointestinal adverse events the most common finding and dose-related. BPC-157, by contrast, is supported almost entirely by rodent studies from a single research group, reviewed in 2018, with no controlled human trials published. None of this is a claim about the products on this page.
Batch testing and certificates of analysis
A certificate of analysis states what an independent laboratory identified in a specific batch and the purity it measured. Every Free Muscle batch goes to Janoshik Analytical, and the batch number is printed on the pack. Email us that number and we will send the certificate. A certificate without a batch number is marketing, not testing. Read more on our lab tests page.
Where to buy research peptides in the UK: how to check a supplier
Whichever shop you buy research peptides from, check these five points before you order:
- A batch number and a certificate for that batch. The pack should carry a batch number, and the seller should be able to show a certificate of analysis for that same batch from a named laboratory, with the test date. Every Free Muscle-brand batch is assayed by Janoshik Analytical, and we send the certificate for your batch on request.
- The strength per capsule and the capsule count. With both figures you can work out the total milligrams in the pack and the price per milligram. If a listing does not state one of them, ask the seller before you order.
- Research-use labelling and an age check. A research compound should be sold for laboratory research use only, not for human consumption, to adults aged 18 or over, with no dosing or usage advice. That is how every listing here is sold.
- Prices in pounds sterling and tracked UK dispatch. UK delivery from us is free and tracked on every order, with no minimum spend, and usually arrives 2-3 working days after dispatch; orders placed before 2pm Monday to Friday are processed the same working day.
- A clear returns policy. Unopened items can be returned to us within 30 days.
Brands on this page: Free Muscle, BioLab, Thoroughbred Labs and Yakka Strength. The UK supplier checklist and how we test go into more detail.
Legal status in the UK
None of these peptides is a licensed medicine in the UK or an authorised food supplement. They are sold to adults for laboratory research and are not for human consumption. Under the WADA list, growth hormone secretagogues, IGF-1 analogues and thymosin beta-4 are prohibited at all times, and non-approved substances such as BPC-157 and retatrutide fall under the S0 category.
Delivery and returns
Free Muscle is the trading name of FreeMuscle, a business registered in Andorra, with UK operations and dispatch in Scunthorpe. Every order ships free with UK tracking in plain packaging; EU delivery takes 3 to 7 working days. Orders placed before 2pm Monday to Friday are processed the same working day, and unopened items can be returned within 30 days. See shipping and guarantee. Customers must be 18 or over.
Related reading
- BPC-157: what the research actually shows, and what it does not
- Retatrutide in the UK 2026: licensing status and trials
- SARMs vs Peptides: Choosing by Goal
- How to Read a Certificate of Analysis (COA)
- Related collections: SARMs, MK-677 (Ibutamoren), HGH (Somatropin)
Research compounds sold by Free Muscle are supplied for laboratory research use only and are not for human consumption. They are not authorised as medicines by the MHRA, EMA or FDA, are not food supplements, and are sold only to adults aged 18 or over. Nothing on this page is medical or dosing advice.
References
- Jastreboff AM, et al. Triple-Hormone-Receptor Agonist Retatrutide for Obesity - A Phase 2 Trial. N Engl J Med. 2023;389(6):514-526. PMID: 37366315.
- Sikiric P, et al. Novel Cytoprotective Mediator, Stable Gastric Pentadecapeptide BPC 157. Vascular Recruitment and Gastrointestinal Tract Healing. Curr Pharm Des. 2018;24(18):1990-2001. PMID: 29879879.
Frequently asked questions
Are research peptides legal in the UK?
Buying and possessing these peptides is not an offence in the UK, but none is a licensed medicine or an authorised food supplement, so they cannot be sold for human consumption. Free Muscle supplies them to adults for laboratory research only. Retatrutide is an investigational drug still in trials, and it has no approval anywhere. Check local rules before ordering for delivery outside the UK.
What is the difference between BPC-150 and BPC-157?
BPC-157 is the pentadecapeptide studied in the published rodent literature, and we list other brands' BPC-157 capsules through Muscle Market. BPC-150 is Free Muscle's own-label listing, supplied as 1000 mg capsules and batch-tested by Janoshik Analytical. The BPC-150 collection page describes the listing and its certificate. We make no claim that either behaves like the other in any research setting.
Do peptides in capsule form survive digestion?
Most peptides are broken down by digestive enzymes, which is why clinical research on them almost always uses injection. Capsules are a handling format for laboratory work rather than evidence of oral activity. Our article on oral peptides explains the few exceptions in the literature and where the evidence stops. Nothing we sell is intended to be swallowed by a person.
How do I verify a batch?
Each Free Muscle pack carries a printed batch number. Email it to us and we will send the Janoshik Analytical certificate for that batch, showing the compound identified and its measured purity. Match the batch number on the certificate to your pack. For other brands, we display a certificate only where the manufacturer has supplied one for the batch we actually hold.
Are these peptides banned in sport?
Yes. WADA prohibits peptide hormones, growth factors and related substances at all times, which covers ipamorelin, IGF-1 LR3 and thymosin beta-4. Compounds with no medical approval, such as BPC-157 and retatrutide, are prohibited under the non-approved substances category. Tested athletes should treat every item in this collection as prohibited.
Can I see the certificate before I order?
Yes. Every Free Muscle-brand batch is assayed by Janoshik Analytical, and the certificate for a batch is sent on request: email us with the product name before you order and ask for the certificate of the batch currently in stock.
How fast is UK delivery?
UK delivery is free and tracked on every order, with no minimum spend, and usually arrives 2-3 working days after dispatch. Faster tracked UK delivery costs £6 and usually takes 1-2 working days. Orders placed before 2pm Monday to Friday are processed the same working day.
Do you deliver to Romania and the rest of the EU?
Yes. Orders to Romania and other EU countries travel by our paid, tracked international service and usually arrive 3-7 working days after dispatch; delivery to the rest of the world usually takes 5-14 working days. Prices are in pounds sterling (GBP). Rules differ in other countries, so check local law before ordering for delivery abroad.
Can I return an order?
Yes: unopened items can be returned within 30 days. Our guarantee page has the full policy.
Is there a discount when I buy more than one?
Yes, on Free Muscle-brand products: 5% off automatically when your cart holds 2 of them and 10% off with 3 or more, applied in the cart. The offers do not combine.