Origin Peptides PT-141 Capsules 500mcg 30 Capsules

Origin Peptides PT-141 Capsules 500mcg 100 Capsules is an oral research capsule containing 500 mcg of PT-141 per capsule, 100 capsules per sealed, tamper-evident bottle, encapsulated in the United Kingdom under the Origin Peptides brand. The powder is batch numbered and every bottle carries the batch on the label. Supplied strictly for laboratory research; not for human consumption.

Product specification

What the published research says

PT-141 (bremelanotide) is a synthetic melanocortin receptor agonist derived from Melanotan II, acting mainly at the MC4 receptor.

It has a full pharmaceutical development record: Palatin Technologies took it through phase III trials (the RECONNECT studies, Kingsberg and colleagues, Obstetrics and Gynecology, 2019) and it was approved by the FDA in 2019 as Vyleesi, a self-injected medicine for hypoactive sexual desire disorder in premenopausal women. Earlier nasal spray development was stopped over blood pressure findings.

The clinical data belong to the licensed injectable medicine. This product is an oral research capsule, a different format with no published data of its own, and it is not a medicine.

Research profile

The research profile card in the image gallery scores five areas of the published literature out of five (tissue repair, recovery and sleep, growth and muscle, fat loss and metabolic, cognition and longevity). It reflects where the studies have concentrated, not a claim about effects. PT-141 Capsules sits in the Hormonal Signalling category of the Origin Peptides range, which is colour coded on the vial band and the card.

Handling and storage

Capsules are shelf stable. Keep the bottle sealed in a cool, dry place below 25C and out of direct sunlight; humidity is the main cause of degradation, so a cupboard is better than a bathroom or kitchen shelf. The bottle carries the batch number and a research-use notice.

Quality and batch testing

Origin Peptides is the SARMs Store research peptide range, supplied from 2026 alongside the Dexterz Labs compounds we have sold since 2020. Every vial and bottle carries a batch number and every batch is tested by an independent laboratory (identity by HPLC or LC-MS, stated purity). The certificate of analysis is published on the Lab Testing page and can be matched to the number on your vial. Quote the batch number to live chat or the contact form if you need the report for your research records.

Frequently asked questions

Is it legal to buy in the UK? Research peptides of this kind are not controlled substances under the Misuse of Drugs Act 1971, so buying and holding the material for laboratory research is lawful. Selling or advertising it for human use would make it an unlicensed medicine under MHRA rules, which is why this listing carries no usage guidance and every item is labelled research use only.

How do the capsules differ from the vial? Same compound, different format. The vial is lyophilised powder for laboratory reconstitution; the capsule is a fixed 500 mcg oral research format. No published data compare the two formats for this compound, and none is claimed here.

How is it shipped? Orders placed before the daily cut off are despatched the same working day by tracked delivery, usually arriving within two to three working days for UK addresses, with a next day upgrade available at checkout. Parcels are plain and unbranded. Vials travel lyophilised, which tolerates transit at ambient temperature; refrigerate or freeze on arrival.

Are these compounds prohibited in sport? Most peptides in this range are prohibited by WADA, either under S0 (non-approved substances) or S2 (peptide hormones and growth factors). Anyone subject to anti-doping rules should treat the whole category as prohibited.

Research use only. This product is supplied strictly for laboratory and research purposes and is not for human or veterinary use. It is not a medicine, not a food supplement and not intended to diagnose, treat, cure or prevent any disease. Sold to persons aged 18 or over only.