How the effects begin
Melanotan 2 Mechanism of Action means how its effects begin
Skin cells may make more pigment, while brain areas may change appetite or sexual response.
One hormone copy can cause several changes
The Melanotan 2 mechanism of action starts with a hormone your body produces to affect hunger, sex, and skin color. Melanotan 2 is shaped enough like that hormone to act in some of the same places. Its closed form also slows breakdown.
A receptor is a small part of a cell where a hormone can attach. Your body has five related types. Melanotan 2 may attach to all five. One type helps skin make dark pigment. Brain types may curb appetite or cause an erection. Because the compound doesn't choose only one type, several effects may begin together.
Four cell sites help explain the main effects
Scientists found five related cell sites where this hormone can attach. Melanotan 2 may attach to all five [11]. Scientists know the main jobs of four [11]:
- One type in skin helps pigment cells darken your skin and hair.
- One type in the brain affects hunger, energy use, and sexual function.
- Another brain type helps your body use food and hold a normal temperature.
- One type in glands affects body parts that make fluids, including skin oil. Studies don't tell you what this effect would feel like.
Scientists don't yet have a clear answer for the fifth type's part in these changes. Afamelanotide acts mainly on skin color. Bremelanotide aims more at sexual effects [3]. Each drug has approval for one narrow use. Melanotan 2 affects more body systems, so its effects can spread farther.
Skin cells make more dark pigment after contact
Your skin changes through several small steps. First, Melanotan 2 attaches to a pigment cell. Proteins inside the cell then become active. One is an enzyme, a protein that helps a task happen and lets the cell make more dark brown pigment.
Sunlight also begins this work in your skin. The process can begin even without sunlight. Early lab work asked whether the extra pigment could give skin some defense against harm from sunlight [7]. Later work described how the body's own hormone starts the same steps [11]. No tanning treatment gained approval.
Brain effects can change eating and erections
In the brain, one cell type helps control the wish for food. After the compound acted there, mice ate less. They also stopped sooner while working for food [5]. A related brain site can start the erection effect [8]. The first change happens in the brain, not the penis.
Rat work found another link. Melanotan 2 made brain cells release more oxytocin [9]. This hormone has roles in birth, touch, and social bonds. Researchers also gave the rats a blocker called SHU-9119. The blocker stopped the oxytocin rise. This showed that those cell sites were needed for the rise. Because these cell sites are spread out, skin color, appetite, and sexual response may all change.
Its closed shape makes it stronger and longer lasting
Arizona scientists joined the ends of a hormone copy to form a ring [1], [3]. They also changed one small building block. These changes made Melanotan 2 attach more strongly to cells. They also made it harder for enzymes to break the compound apart.
Your body's own hormone breaks down faster. The compound can therefore act more strongly and last longer. You can read why it was made, and sort out its names, on what is melanotan 2.