Found via @farnamstreet.
Say "placebo effect" and most people think of the boost they may get from a sugar pill simply because they believe it will work. But more and more research suggests there is more than a fleeting boost to be gained from placebos.
A particular mind-set or belief about one's body or health may lead to improvements in disease symptoms as well as changes in appetite, brain chemicals and even vision, several recent studies have found, highlighting how fundamentally the mind and body are connected.
It doesn't seem to matter whether people know they are getting a placebo and not a "real" treatment. One study demonstrated a strong placebo effect in subjects who were told they were getting a sugar pill with no active ingredient.
Placebo treatments are sometimes used in some clinical practices. In a 2008 survey of nearly 700 internists and rheumatologists published in the British Medical Journal, about half said they prescribe placebos on a regular basis. The most popular were over-the-counter painkillers and vitamins. Very few physicians said they relied on sugar pills or saline injections. The American Medical Association says a placebo can't be given simply to soothe a difficult patient, and it can be used only if the patient is informed of and agrees to its use.
Researchers want to know more about how the placebo effect works, and how to increase and decrease it. A more powerful, longer-lasting placebo effect might be helpful in treating health conditions related to weight and metabolism.
Related article (that I'd love to read if anyone happens to have a digital copy of it): “The Power of Nothing” - by Michael Specter