A new study undermines one of the most strongly held beliefs in medicine. It indicates there is no such thing as a placebo effect. The placebo effect is the idea that people can get better if they believe the treatment will work, even if the treatment is fake. To see if there is a placebo effect, Danish researchers examined studies that compared placebo to no treatment at all. They found the placebo made virtually no difference at all. The researchers now recommend that doctors should not treat patients with a placebo. The say it's o-k though to use a placebo in experiments. In these cases, some patients get a placebo and others get an experimental treatment. The idea is to see if the treatment works.