PT-141 vs Melanotan-2 · melanocortin research comparison
PT-141 vs Melanotan-2: same pathway, different selectivity.
PT-141 and Melanotan-2 are family — both are synthetic melanocortin-receptor agonists, and PT-141 (bremelanotide) is in fact a metabolite of Melanotan-2. The difference researchers care about is receptor selectivity. Melanotan-2 (MT-II) is a broad, comparatively non-selective melanocortin agonist with notable MC1-receptor (pigmentation-pathway) activity. PT-141 is studied chiefly at the MC4 receptor and lacks the MC1-dominant pigmentation profile. This page compares the two as research compounds — mechanism and target, not human-use or dosing — and notes which one Titan actually stocks. Research use only.
How the two are related
Melanotan-2 is the parent compound; PT-141 (bremelanotide) is a metabolite of it. That shared lineage is exactly why they get cross-searched — they sit on the same melanocortin pathway. But they are not interchangeable: the metabolism that produces PT-141 strips much of Melanotan-2's broader receptor activity, leaving a more MC4-weighted profile. Same family tree, different branch.
PT-141 research reference →The receptor-selectivity difference
Melanotan-2 is a comparatively non-selective melanocortin agonist that engages multiple melanocortin receptors, including MC1 — the receptor associated in the literature with the pigmentation pathway. PT-141 is studied predominantly at MC4 and does not carry the same MC1-dominant pigmentation profile. The selectivity gap is the single most useful distinction between them as research targets.
PT-141 nasal vs injection →Structure and format
Both are short cyclic melanocortin peptides supplied for laboratory reconstitution. PT-141 is Titan's in-stock compound, offered as a metered nasal spray (1mg per actuation) so no reconstitution math is required, alongside an injectable-reference profile in the dosage notes. Melanotan-2 is the comparison reference in this article — Titan does not stock it — so any cross-vendor MT-2 should be read against its own release sheet.
View the PT-141 nasal spray →What Titan stocks
Titan stocks PT-141 as a nasal spray ($69.99) with a lot-matched release sheet, an HPLC purity target, and identity confirmation by mass. Melanotan-2 is referenced here only as the parent-compound comparator; we do not list it. For melanocortin-pathway research at Titan, PT-141 is the in-stock tool — confirm format and documentation on the product page before ordering.
Where to buy PT-141 →How to source it
Titan is crypto-only — BTC, USDC, or SOL. The network and wallet are shown before payment and an order ID is logged with support first. Paying in USDC holds the total at the quoted figure. On a melanocortin research comparison, the screen should point to documented, identity-confirmed material — not just the lowest price on a forum.
Crypto checkout walkthrough →Where the research-use line sits
PT-141 and Melanotan-2 are research compounds. PT-141 in its bremelanotide form has an approved-drug counterpart referenced only as context; the research-grade reagent is not that medicine. Nothing here is dosing guidance or a human-use protocol — Titan supplies research material strictly for in-vitro laboratory work, not for human or animal consumption, and claims no therapeutic, cosmetic, or performance outcome.
See the testing workflow →The detail, in plain terms
Parent compound vs metabolite, side by side.
The comparison rests on receptor selectivity within a shared melanocortin pathway — Melanotan-2 is the broad parent, PT-141 the more MC4-weighted metabolite. Titan operates only in the PT-141 column.
- Melanotan-2 (MT-II)
- Broad, less-selective melanocortin agonist · notable MC1 (pigmentation) activity · the parent compound.
- PT-141 (bremelanotide)
- Metabolite of Melanotan-2 · studied chiefly at MC4 · lacks the MC1-dominant pigmentation profile.
- Shared pathway
- Both are synthetic melanocortin-receptor agonists — same family, different selectivity.
- Key differentiator
- Receptor selectivity: MT-2 broad/MC1-active; PT-141 narrower/MC4-weighted.
- Titan format
- PT-141 metered nasal spray, 1mg/actuation, no reconstitution required.
- Titan stocks
- PT-141 ($69.99) — research use only; Melanotan-2 is the comparator, not stocked.
Questions researchers ask
Before you order.
- What is the difference between PT-141 and Melanotan-2?
- Both are synthetic melanocortin-receptor agonists, and PT-141 (bremelanotide) is a metabolite of Melanotan-2. The key difference is receptor selectivity: Melanotan-2 is a broad, comparatively non-selective agonist with notable MC1-receptor (pigmentation-pathway) activity, while PT-141 is studied predominantly at the MC4 receptor and lacks the MC1-dominant pigmentation profile. This is research framing, not human-use or efficacy advice.
- Is PT-141 the same as Melanotan-2?
- No — but they are related. PT-141 (bremelanotide) is a metabolite of Melanotan-2, so they share the melanocortin pathway, but the metabolism that produces PT-141 narrows its receptor profile toward MC4 and away from the broader MC1 pigmentation activity of the parent compound. They are studied as distinct research targets, not as interchangeable compounds.
- Does Titan sell both PT-141 and Melanotan-2?
- Titan stocks PT-141 as a metered nasal spray at $69.99, supplied with a lot-matched release sheet and HPLC purity target. Melanotan-2 is referenced in this comparison only as the parent-compound comparator — Titan does not list or ship it. For melanocortin-pathway research at Titan, PT-141 is the in-stock tool.
- Why is PT-141 offered as a nasal spray?
- Titan supplies PT-141 as a metered nasal spray delivering roughly 1mg per actuation, which removes the reconstitution math a lyophilized vial requires. The dosage notes also include an injectable-reference profile for laboratory context. Format choice is documented on the product page; nothing here is a human-use protocol.
- Are PT-141 and Melanotan-2 for human use?
- No. Research-grade PT-141 and Melanotan-2 sold as reagents are not for human or animal use. PT-141's bremelanotide form has an approved-drug counterpart referenced only as context — the research reagent is not that medicine. Titan supplies material strictly for in-vitro laboratory work, with no therapeutic, cosmetic, tanning, or performance claim.