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“Medical Myths” Debunked

Jan 1, 2008

Have you ever had a patient come to you tell you someone said ………….., and you laughed. Well check out Medical Myths-Debunked and you can learn how those silly things get started.

“Medical Myths” Debunked

Reading in dim light will damage your eyes.
You need 8 glasses of water a day to stay healthy.
Shaving your legs will make the hair grow back faster.
Eating turkey makes you drowsy.
We only use 10% of our brains.
Hair and fingernails continue to grow after death.
Mobile phones are dangerous in hospitals.

These well-worn theories are among seven “medical myths” exposed in a paper published on Friday in the British Medical Journal, as part of their light-hearted Christmas edition.  Two U.S. researchers took seven common beliefs and searched the archives for evidence to support them.

Despite frequent mentions in the popular press of the need to drink eight glasses of water, they found no scientific basis for the claim.

* Reading in dim light ruins your eyesight
The majority of eye experts believe it is unlikely to do any permanent damage, but it may make you squint, blink more and have trouble focusing, the researchers said.
* Shaving makes hair grow back faster or coarser
It has no effect on the thickness or rate of hair regrowth, studies say. But stubble lacks the finer taper of unshaven hair, giving the impression of coarseness.
* Eating turkey makes you drowsy
It does contain an amino acid called tryptophan that is involved in sleep and mood control. But turkey has no more of the acid than chicken or minced beef. Eating lots of food and drink at Christmas are probably the real cause of sleepiness.
* We use only 10 percent of our brains
This myth arose as early as 1907 but imaging shows no area of the brain is silent or completely inactive.
* Hair and fingernails continue to grow after death
This idea may stem from ghoulish novels. The researchers said the skin dries out and retracts after death, giving the appearance of longer hair or nails.
* Mobile phones are dangerous in hospitals

Despite widespread concerns, studies have found minimal interference with medical equipment.

The research was conducted by Aaron Carroll, an assistant professor of paediatrics at the Regenstrief Institute, Indianapolis, and Rachel Vreeman, fellow in children’s health services research at Indiana University School of Medicine.

BMJ, Dec. 28th, 2007