Researchers have identified several physiological mechanisms to explain the effects of acupuncture. First, acupuncture stimulates electromagnetic signals in the body to be relayed at a greater rate than normal. Some of these signals start the flow of pain-killing biochemicals such as endorphins, while others mobilize immune system cells to specific sites that are injured or vulnerable to disease. Placing needles at specific acupuncture points also activates opioids in the brain that relieve pa