Cognitive, immune & neuropeptidesCommonly misrepresented

PT-141

Also known as Bremelanotide

A cyclic heptapeptide melanocortin agonist. Closely related in structure to melanotan II, which is one reason the two get swapped.

What we measure

HPLC purity (%)
Identity by LC-MS/MS
Measured mass per vial (mg)

What tends to go wrong

Structurally close to melanotan II — identity confirmation matters.

This is a pattern we see across submitted samples, not a claim about any particular vendor. The only way to know about your vial is to test your vial.

Optional add-ons

Heavy metals screen
ICP-MS for lead, arsenic, cadmium and mercury.
+$149
Endotoxin (LAL)
Bacterial endotoxin screening added to the same sample.
+$249
Rush — 2 business days
Moves your sample to the front of the queue on arrival.
+$199

Related compounds

Thymosin Alpha-1

28-residue immune-modulating peptide.

Semax

ACTH-derived neuropeptide.

Selank

Tuftsin-derived neuropeptide.

MOTS-c

Mitochondrial-derived 16-residue peptide.