It’s no wonder the sun makes us feel good, and it’s not only because of the benefits of Vitamin D! Researcher David Fischer and his team at Massachusetts General Hospital in Boston discovered that a particular endorphin is released in rodents chronically exposed to ultraviolet light. The endorphin is the same one that responds to opiates and is associated with addiction. In addition to experiencing the pleasurable effect of the endorphin, UV exposed animals are less sensitive to pain. This can explain why millions of tanners seek out the sun despite all our warnings of the high risks of skin cancer.