The Zerona is a low level laser which is being promoted and used for body contouring. It works by causing a tiny puncture to the fat cell, which spews out its contents, which are then eliminated by normal body metabolism.
The procedure involves what's called a cold laser, or Low-Level Laser Therapy, which uses low levels of light to stimulate fat cells. This kind of laser doesn't heat your body tissue, so you shouldn't feel anything. When the zapped fat cells collapse, their content is naturally released as waste from your body, resulting in fat loss.
Since Zerona is a non-surgical procedure, there are no major side effects currently associated with it. Additionally, most patients report that treatments are completely pain-free. Results should be visible in as little as two weeks. Most patients experience around 2-4 inches of fat loss on treated areas, if not more.