What Is Melanotan 2, and how can it darken skin?
Arizona chemists made Melanotan 2 to mimic a skin-color hormone and last longer. Skin grew darker, but effects in the brain appeared too.
What is the plain answer?
What is Melanotan 2? The Arizona university team finished it late in the 1980s. They aimed to make the hormone behind your skin color stronger and longer lasting [3]. Seven amino acids make the drug; your body uses those small pieces to build proteins.
In the small tests, men's skin darkened even though they avoided sunlight. The drug also reaches your brain, so you may feel less hungry or think more about sex. MT-2 and Melanotan II are two other names you'll see. It isn't approved medicine, and researchers didn't complete full tests in people. I'd keep that limit close as you read.
What is the drug made from?
Melanotan 2 contains seven amino acids. These are small parts that your body also uses to build proteins. Chemists closed the chain into a loop [3]. That shape doesn't break down as quickly as the hormone it copies.
The body's skin-color hormone has thirteen amino acids. Chemists kept only part of that hormone and changed one of its amino acids. They also linked two points in the chain to close the loop. The result was stronger and harder for the body to break down [3].
Why can Mt2 change more than your skin?
Mt2 is another name for this drug. There are five kinds of cell protein that Melanotan 2 can reach [3]. Each protein receives chemical messages, but their jobs aren't the same. That wide reach can leave you with effects that don't seem tied together.
One kind helps your pigment cells darken skin and hair. Inside your brain, another controls appetite and responses tied to sex. The rest take part in using food, setting blood pressure, and making oil in skin glands. A skin-only drug would avoid your brain, but Melanotan 2 doesn't.
How does the drug make a pigment cell work?
On your skin, Melanotan 2 meets a receptor, a protein on a pigment cell that receives chemical messages [3]. That contact starts work inside the cell. A chemical message reaches the cell's stored work orders. Your cell then begins making more color.
An enzyme, a protein with one set job, helps make the brown-black skin color called melanin. The work doesn't stop when little of the drug is left in your bloodstream. Your color may therefore fade over weeks, as Melanotan 2 research explains.
How does this drug differ from its two relatives?
Afamelanotide, which is also called Melanotan I, is one relative. For people with a rare illness, ordinary light can cause great pain; afamelanotide passed human tests to help them [29][30]. Bremelanotide, called PT-141 in early work, is the other relative. Both came from research tied to Melanotan 2, while bremelanotide is approved when certain women have too little desire for sex [31].
Neither approval covers Melanotan 2. Melanotan 2 remains unapproved everywhere. You can't use a test of one relative to prove Melanotan 2 is safe for you. Melanotan 2 effects and research explain what happened with each drug.