What the studies say
Melanotan 2 may bring a tan, less hunger, and grave harm
You start with the people in the small studies, then see what animal work adds. You also see the known harms.
A tan may come with other changes
You may notice a darker tan before any other change. Melanotan 2 can imitate a hormone made in your own body. This hormone helps your skin cells make brown color, and it also affects hunger and sexual function. For you, one shot may change several parts of the body.
Medical or beauty use has never been approved. Only a few small human studies were done, while much of the other work used rats or mice. Doctors have reported darker moles, new moles, melanoma, and kidney harm. Melanoma is a dangerous skin cancer. Reports also describe muscle damage and long, painful erections. You can find those details on the effects page.
Melanotan 2 changed skin, hunger, and erections
In the late 1980s, Arizona scientists made Melanotan 2 to last longer in the body [1], [3]. Melanotan 2 imitates one hormone with jobs in both your skin and brain. A receptor is a small cell part where a hormone can attach, and scientists found five related types [11].
One type helps skin and hair grow darker [1]. In animals, another type in the brain reduced eating [5]. Melanotan 2 can also start an erection through the brain [2]. These changes may occur together in your body.
The human work was small. One early study gave shots beneath the skin to 3 men. After five low shots, doctors measured a darker skin color [1]. A second study followed 10 men whose doctors linked erection trouble to emotions. Clear erections occurred in 8 of 10 men. Firmness at the penis tip averaged 38.0 minutes, versus 3.0 minutes after placebo [2]. A placebo contains no medicine. No larger study later checked benefits and harms in more people [1], [3].
Five cell sites help explain the wide effects
The body has five related cell sites for this hormone. One type helps set your skin color. In your brain, another type affects appetite and sex. A third controls how your body uses food and heat. A fourth sits in glands, body parts that make fluids such as skin oil [11]. Scientists don't yet have a clear job for the fifth type here. Melanotan 2 may reach every type. Your skin, appetite, and sex life may change together.
Two approved drugs have narrower effects. Afamelanotide mainly affects skin color and treats a rare sun illness. Bremelanotide (PT-141) mainly affects sexual function [3]. Melanotan 2 isn't either approved medicine. Unlike those drugs, Melanotan 2 may affect several systems at once. The page about how Melanotan 2 works explains why its effects reach farther.
This site explains studies but gives no treatment advice
This site offers no clinic visit and sells nothing. It explains what Melanotan 2 studies found, with each number tied to the study beside it. You won't find steps for taking the compound here.
No authority has approved Melanotan 2 for use in people [3]. Doctors reported a kidney damaged when its blood supply was blocked [4]. Other reports cover severe muscle damage, painful erections, and melanoma. You can review those harms on Melanotan 2 effects. Human and animal work appears on Melanotan 2 research. The full source list is on Melanotan 2 references. A dose shown here tells you only what one study used.