Melanotan II: Tracking the "Tanning Peptide" Properly

Melanotan II (MT-II) is the peptide most associated with cosmetic tanning. It is a synthetic analog of α-MSH that stimulates melanocyte activity. Whether or not someone chooses to use it, the tracking problem has a few characteristics that distinguish it from other peptides — most importantly, the outcome (skin pigment) is visible and the side-effect window is front-loaded.

What MT-II does

MT-II binds to melanocortin receptors, which stimulates melanin production. People who self-experiment with it typically report deeper, more durable tan with less UV exposure than they would otherwise need.

Typical protocol shape

Self-reports cluster around a two-phase protocol:

• Loading phase (1–3 weeks): daily small SC injections to push pigmentation
• Maintenance phase: 1–3 doses per week to hold the colour

Loading is where most side effects appear: nausea, flushing, appetite suppression, and increased libido are commonly reported. These typically fade within the first 1–2 weeks.

What to track daily during loading

• Dose administered (units, time, site)
• Nausea (0–10), particularly 30–60 minutes post-dose
• Flushing or warmth
• Appetite — many users report reduced appetite during loading
• Sleep
• Any unusual skin changes (new moles, darkening of existing moles)

The mole point is non-negotiable. MT-II can darken existing nevi. Photograph any mole you're already tracking on day 0 and re-photograph weekly.

What to track weekly

• Standardised skin photo: same lighting, same body area, same time of day. Pick a reference area (inner forearm works well) and photograph it weekly.
• Subjective shade self-assessment (1–10)
• UV exposure — minutes of sun or device time per day

Realistic timeline

• Days 1–7: side effects most pronounced, no visible pigment change
• Days 7–14: subtle darkening on areas with even minimal UV
• Days 14–30: clearly visible tan develops with continued sun/device exposure
• Maintenance: 1–3 doses per week, adjusted by how much sun the user is getting

Without any UV exposure at all, MT-II's pigment effect is limited. It is a sensitiser, not a substitute for UV.

Common mistakes

• Treating loading like a competition. Higher doses ≠ faster tan. They equal worse nausea.
• No mole photos. This is the one tracking item that actually matters for safety.
• Doses on full stomach. Nausea is much worse with food in stomach near a dose.
• No baseline skin photo. Without it, you cannot confirm change.

A 4-week tracking template

• Week 0: baseline. Photos of reference area + every existing mole.
• Week 1: daily dose. Daily nausea/sleep/appetite. Daily UV minutes.
• Week 2: daily dose. Photo of reference area at end of week.
• Week 3: reduce to maintenance. Photo at end.
• Week 4: maintenance. Photo at end. Re-photograph moles.

Safety notes worth taking seriously

MT-II is unscheduled in most jurisdictions but unapproved by major regulators. Reported risks include darkening of nevi, blood pressure changes, and unpredictable systemic effects in long protocols. The tracking discipline above doesn't reduce those risks — but it gives you the data to spot a problem early and stop.

Peptide IA is an educational and self-tracking tool. Nothing in this post is medical advice. Doses mentioned reflect what is commonly reported in research literature — they are not recommendations. Always consult a qualified physician before starting, changing, or stopping any protocol.