There is some evidence to suggest that tanning may increase dopamine levels in the brain. Dopamine is a neurotransmitter that’s associated with pleasure and reward, and it’s thought that the UV rays from the sun may trigger its release. This could explain why some people become addicted to tanning; they simply enjoy the way it makes them feel. Of course, it’s important to moderate your exposure to UV rays, as too much can be harmful. If you’re looking for a healthy way to boost your dopamine levels, there are many other activities that do so without harming your skin, such as exercise, listening to music, or spending time with friends and family.