MT-1 (Melanotan I) vs MT-2 (Melanotan II)
MT-1 vs MT-2 for tanning: side effect profile, libido effects, FDA status, and which is gentler.
The verdict
MT-1 is the more selective, cleaner option: it drives pigmentation with fewer of the extra effects people complain about. MT-2 tans harder and faster but is less selective, so it also hits libido and tends to bring rougher side effects like nausea and the libido spike. If you mainly want color with the least baggage, MT-1 is the gentler pick. People reach for MT-2 when they want the strongest pigment response and accept the messier profile that comes with it.
MT-1 mimics a hormone your body uses to make pigment in your skin. With sun or tanning-bed exposure, it gives you a darker tan from much less UV time. Cleaner side effect profile than the more popular MT-2.
MT-2 is the more potent (and rougher) sibling of MT-1. Stronger pigmentation but harder side effect profile, including unwanted libido effects. Most people who tried MT-2 first migrate to MT-1 for cleaner results.
Which one should you pick?
Pick MT-1 (Melanotan I) if light-skinned users wanting baseline tan with less uv time or people who tried mt-2 and didn't tolerate the libido / nausea hit.
Pick MT-2 (Melanotan II) if users wanting deeper pigmentation than mt-1 delivers or people who specifically want the libido side effect.
Still torn between MT-1 (Melanotan I) and MT-2 (Melanotan II)?
The AI Coach reads both, asks about your goal and experience, and tells you which one actually fits — plus how to dose and stack it. Free.
Common questions
- Can you stack MT-1 (Melanotan I) with MT-2 (Melanotan II)?
- Neither entry lists the other as a stack partner. Each full entry has its own stacking notes.
- What's the dose difference between MT-1 (Melanotan I) and MT-2 (Melanotan II)?
- MT-1 (Melanotan I): Loading: 250-500 mcg sub-q daily for 2-3 weeks. Maintenance: 250-500 mcg, 1-2x weekly. Often paired with UV, which is not required for pigmentation and does not become safer because of it.
- MT-2 (Melanotan II): Loading: 250-500 mcg sub-q daily for 1-2 weeks. Maintenance: 250-500 mcg, 2-3x weekly. Often paired with UV, which is not required for pigmentation and does not become safer because of it.
- Is MT-1 (Melanotan I) or MT-2 (Melanotan II) FDA approved?
- MT-1 (Melanotan I): Approved as Afamelanotide (Scenesse), 2019, for adults with erythropoietic protoporphyria.
- MT-2 (Melanotan II): Not FDA approved. Afamelanotide (MT-1) is the approved analog.
- What are the side effects of MT-1 (Melanotan I) vs MT-2 (Melanotan II)?
- MT-1 (Melanotan I): Nausea (first doses, usually fades); Facial flushing; Appetite suppression.
- MT-2 (Melanotan II): Nausea (more pronounced than MT-1); Facial flushing; Spontaneous erections / increased libido.
Want the latest evidence updates?
Drop your email and we'll send you the one-page checklist for vetting any peptide before you trust a vendor or a forum: what to verify, the red flags, and the questions to ask a licensed provider. No card.
No spam, and we never sell your email. Just the checklist. Email support@pepdex.co to opt out any time.