Everyone says melanotan causes cancer, but the actual science doesn’t support that claim.
Melanotan works by activating the melanocortin receptor, which increases melanin production in the skin. That’s the same natural pathway your body uses when you tan from sunlight.
The cancer rumor mostly comes from a few case reports where people developed melanoma after using melanotan. But those reports never proved melanotan caused the cancer. Most of those individuals were already heavy tanning bed users or had high UV exposure, which is the real driver of melanoma.
To date, there are no controlled human studies showing melanotan causes skin cancer.
In fact, a pharmaceutical version of this peptide called Afamelanotide is approved medically to increase melanin in patients with extreme sun sensitivity.
The real risk factor for melanoma has always been UV damage, tanning beds, and genetics — not peptides that stimulate the same pigment pathway your body already uses.
So when people say melanotan causes cancer, what they’re usually repeating is speculation, not actual evidence.