PT-141 (Bremelanotide)
PT-141 (Bremelanotide) is a synthetic cyclic peptide acting as a melanocortin receptor agonist at MC4R and MC3R, supplied as a pre-loaded multi-dose injector pen for research and laboratory use only.
Sequence: Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH. It is derived from the Melanotan II scaffold, differing at the C-terminus where the amide is replaced by a hydroxyl — a single change that published work associates with its narrower receptor selectivity.
Every batch is HPLC-verified by an independent laboratory. Certificates of Analysis are published on the product page as each batch is verified — ask us if you need the report for a specific batch. Store at 2–8 °C in the dark.
Not for human or veterinary use. Not intended to diagnose, treat, cure or prevent any disease.
Lab tested by
Independently verified · every batch
Shipping & Returns
Shipping & Returns
FAQ
FAQ
Dosing Chart
Dosing Chart
Frequently Bought Together
Independently verified
Lab-tested purity, every batch.
PT-141 (Bremelanotide) is analysed by an independent laboratory for identity and purity by HPLC and mass spectrometry.
View certificateWhy it matters.
Melanocortin peptide.
A cyclic heptapeptide agonist at central melanocortin receptors.
Verified by Janoshik.
Independent HPLC + MS testing. Report linked above.
Reference-grade.
Lyophilised powder. Sealed, labelled, batch-traceable.
How it works
Three receptors. One molecule.
Reference data
Inside the pen.
The molecular profile, confirmed by independent analysis.
View certificateDosing & reconstitution calculator
Enter your own values to work out concentration, volume and clicks. A calculation tool only — not dosing guidance.
For research and laboratory use only. This tool performs arithmetic on the values you enter and does not constitute dosing, medical, or veterinary advice. Always verify calculations independently.
Sources
Cited, not claimed.
Every reference below is publicly available, peer-reviewed.
FAQ's
What is PT-141?
What is PT-141?
How is PT-141 related to Melanotan II?
How is PT-141 related to Melanotan II?
What does 'melanocortin receptor agonist' mean?
What does 'melanocortin receptor agonist' mean?
Is this compound third-party tested?
Is this compound third-party tested?
What is a Certificate of Analysis, and why does it matter?
What is a Certificate of Analysis, and why does it matter?
How should PT-141 be stored?
How should PT-141 be stored?
Is this product intended for human use?
Is this product intended for human use?
How quickly is it shipped?
How quickly is it shipped?










