Melanotan 2 timeline: what research and user reports show

Melanotan 2 activates melanocortin receptors more broadly than Melanotan 1, which is why its tanning effect comes bundled with a wider set of reported side effects, most notably nausea and flushing.

First doses: nausea and flushing

Nausea, facial flushing and appetite suppression are the most consistently reported effects with the first several doses. Reports generally describe these easing noticeably as dosing continues, and starting at a lower dose is commonly associated with a milder first-dose response.

Weeks 1 to 3: pigmentation response

Tanning, combined with UV exposure, is generally reported to build over one to three weeks. Libido effects are also commonly reported, tied to the same broader receptor activity behind Melanotan 2's other effects, including the acute-onset compound PT-141, which was developed from the same research.

Common questions

Does the nausea go away? It is commonly reported to lessen substantially after the first several doses. How is this related to PT-141? PT-141 was derived from Melanotan 2 research and shares receptor activity, but it is generally used for an acute, per-dose effect rather than a cumulative tanning timeline.

For mechanism, dosing reference and citations, see the Melanotan 2 reference page.