What PT-141 Is

PT-141 is a research peptide that works on the brain rather than on blood flow. It comes from the same melanocortin family as Melanotan 2, but it’s tuned to a different receptor.

Most well-known arousal compounds work on blood flow. PT-141 takes a different route entirely — it acts centrally, in the brain, on the melanocortin system. That different mechanism is exactly what makes it an interesting research tool.

It was developed out of Melanotan 2. Researchers noticed Melanotan 2 had effects beyond pigment, traced them to the MC4R receptor, and refined the molecule into PT-141 to focus on that pathway.

Its ring-shaped (cyclic) structure makes it more stable than the natural melanocortin fragments it’s based on, which is part of why it’s a practical compound to work with in the lab.

PT-141 vs Melanotan 2 vs Melanotan 1

PT-141 sits in the melanocortin family alongside the two Melanotans. They overlap, but each leans toward a different receptor — and a different research question.

PT-141 grew directly out of Melanotan 2 research. They share a family, but where Melanotan 2 is broad and pigment-focused, PT-141 was refined to home in on the MC4R arousal pathway — which is what makes it a distinct research compound.

What the Research Looks At

Central arousal pathways. PT-141’s defining feature is that it acts in the brain through MC4R rather than on blood flow, so most research looks at melanocortin signalling in arousal.

Receptor selectivity. Researchers study how PT-141 prefers the MC3R and MC4R receptors over the pigment receptor MC1R — the thing that separates it from broader melanocortins like Melanotan 2.

Peptide stability. Its cyclic structure makes it more stable than natural melanocortin fragments, which is itself a point of interest for peptide-design research.

Why Source PT-141 Locally in Thailand

Buying PT-141 from overseas means customs delays, long transit and temperature swings that can quietly degrade a peptide before it arrives. Sourcing locally removes all three.

Bangkok Peptides keeps stock in Bangkok, ships from Bangkok, and delivers across Thailand on tracked services — so you get your order in days, not weeks, with a handling chain you can actually verify.

Delivery Across Thailand

We ship PT-141 nationwide by tracked courier. Most orders qualify for same-day or next-working-day dispatch from Bangkok, with arrival depending on where you are.

Reconstitution & Handling

PT-141 arrives as a freeze-dried (lyophilised) powder in a sealed sterile vial. Before any research use it needs mixing with bacteriostatic water. Standard lab handling applies.

Add the water slowly down the inside wall of the vial — not straight onto the powder — then swirl gently until it dissolves. Don’t shake. The solution should look clear.

Keep the sealed vial cool, dry and out of direct light before mixing. Once mixed, store it in the fridge at 2–8°C, which matters in Thailand’s heat. Avoid repeated freeze–thaw cycles. Sealed vials keep for up to 24 months when stored properly.

Frequently Asked Questions