Like all commercial health TV programming, the purpose of the Dr. Oz Show is at least as much entertainment as medicine. Attempting to fill up nearly 5 hours of programming time each week with legitimate medicine while retaining a captive viewing audience is nearly impossible, particularly for a show that is constantly trumpeting new scientific "break-throughs" and "miracles," which in real life are nearly non-existent. Hence, Dr. Oz fills his time with all sorts of material from the dubious to the downright fraudulent. In the past he has given time to such quacks as Joseph Mercola. Oz generally stops short of endorsing these charlatans, but the fact a legitimate doctor gives them a platform at all borders on malfeasance. It also gives these medical frauds the ability to promote themselves with "as seen on the Dr. Oz Show.