
PT-141
10 mg · pre-filled · sealed
PT-141, also called bremelanotide, is a seven-amino-acid cyclic peptide derived from alpha-MSH. It is studied for its action at melanocortin receptors in the nervous system rather than on blood flow.
Price announced at launch
In production in the new Biovanta carton. Join the waitlist for the lab report on day one: we'll email you the day it goes on sale with its Janoshik batch report, 24 hours before we announce it anywhere else. Launch notices only.
Certificate on release
Every batch is analysed before it goes on sale. The report for the first batch is published here the day the product is.
- Swiss-made
- Report in progress
- Sealed pre-filled pen
- Tracked UK delivery
What it is
A cyclic melanocortin-receptor agonist derived from alpha-MSH, studied in the nervous system's desire and arousal pathways rather than in blood flow.
PT-141 is studied as a melanocortin agonist that signals through the central nervous system, unlike compounds that act on blood flow.
Supports
- Desire and arousal pathways
- Melanocortin signalling
Melanocortin receptors. Studied as an agonist at the MC3 and MC4 receptors.
Desire and arousal pathways. Researched in the nervous system's signalling for sexual desire and arousal.
A central mechanism. Investigated for acting through the nervous system rather than the vasculature.
What arrives
- 1 pre-filled pen, 10 mg
- Accessories as supplied by the manufacturer
- Lab certificate on release
- In production
Refrigerate 2–8°C. Protect from light in the original carton. Do not freeze.
The pen
One sealed pen. Nothing to mix.
Filled and sealed in Switzerland, so what arrives is the finished article: no powder, no water, no measuring by hand.

01
The cap
Clips on over the tip. Nothing to assemble.
02
The window
Shows what is left in the sealed cartridge.
03
The dial
Turns in fixed clicks; the reading is printed on the barrel.
04
The knob
Knurled, with the bronze ring. One click, one stop.
Before you order
When will PT-141 be available?
It is in production in the new Biovanta carton. Leave your email on this page and you will hear the day it goes on sale, with its Janoshik batch report. Launch notices only.
Will it have a lab report?
Yes. Every batch goes to Janoshik, an independent lab, and its report is published on this page with the key that opens it on the lab's own site.
Is it legal to buy in the UK?
PT-141 is legal to buy and possess in the UK for laboratory research purposes. It is not a licensed medicine in the UK and cannot be sold for human or veterinary consumption; every pen is labelled for in-vitro research use only.
Also in the range

Retatrutide
Metabolic peptide · 40 mg
£200View

Tirzepatide
Metabolic peptide · 40 mg
£160View

BPC-157 + TB-500
Repair peptides · 40 mg
£140View
Research use only. Not for human or veterinary consumption. The purchaser is responsible for compliant handling and storage.
Read before you order
Is GLP-3 the same as retatrutide? What the nickname actually means
You've seen "GLP-3" in headlines and on listings. It almost always means retatrutide, and it's a nickname rather than a scientific name. Here's where it came from, and why it misleads.
29 September 2026 · 3 min
ReadRetatrutide's phase 3 trials, broken down: TRIUMPH and TRANSCEND
"Phase 3 results are in" posts make it sound like one big trial with one answer. The registry lists fourteen. Here's what each one is, in plain English, and why most of the story isn't published yet.
29 September 2026 · 5 min
ReadKlow vs Glow: what is actually in each blend
If you've seen "Klow" all over your feed and wondered how it differs from Glow, the answer fits in one line: it's the same three peptides plus a fourth. Here's the milligram breakdown, and the chemistry the posts skip.
28 September 2026 · 4 min
Read