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Fact: "There is no medical evidence to suggest that you need that much water," said Dr. Rachel Vreeman, a pediatrics research fellow at the university and co-author of the journal article. Vreeman thinks this myth can be traced back to a recommendation from the Nutrition Council that a person consume the equivalent of eight glasses 64 ounces of fluid a day.

Over the years, "fluid" turned to water. But fruits and vegetables, plus coffee and other liquids, count. Fact: Most physicians queried on this one initially thought it was true. Upon further reflection, they realized it's impossible. The same is true, but less obvious, with hair. As the skin is shrinking back, the hair looks more prominent or sticks up a bit. Fact: Physicians and comedians alike, including Jerry Seinfeld, love to cite this one.

It's sometimes erroneously credited to Albert Einstein. But MRI scans, PET scans and other imaging studies show no dormant areas of the brain, and even viewing individual neurons or cells reveals no inactive areas, the new paper points out. Metabolic studies of how brain cells process chemicals show no nonfunctioning areas.

The myth probably originated with self-improvement hucksters in the early s who wanted to convince people that they had yet not reached their full potential, Carroll figures.

It also doesn't jibe with the fact that our other organs run at full tilt. Fact: The researchers found no evidence that reading in dim light causes permanent eye damage. It can cause eye strain and temporarily decreased acuity, which subsides after rest. Fact: Even Carroll and Vreeman believed this one until they researched it. Water, by the way, is the chief conduit for all your metabolic processes, and it's a big part of your sweat.

But coffee is also mostly water. Overall, coffee doesn't dehydrate you. Nevertheless, if you need fast effective hydration, it's hard to beat a tall glass of water. This one isn't even a little bit true. That event never happened, and Mikey is alive and well. But even if someone tried this, the worst he'd get is a stomach ache and tooth decay. Unless you are on the caveman diet, this just doesn't happen.

This myth says that people accidentally swallow spiders while sleeping. While we sleep with our mouths open, so the story goes, a dangling spider drops down on a line or crawls on over to investigate that warm cave your throat.

We swallow the curious little critter. The problem is that spiders don't do that. They have every reason to avoid our lumbering landscape. We're so big and threatening, we don't represent any helpful target for them. That's why in scary movie scenes, when you see cob webs it signals a dead, abandoned place, devoid of human life. Spiders generally avoid contact with humans wherever they can. Now if you like the taste of spiders you can eat however many you want. But the rest of us need not fear accidental arachnid ingestion. You should see a doctor if food or candy stays in your digestive tract for longer than 24 hours.

It is true, however, that chewing-gum doesn't digest totally. But it will pass through your digestive system within 24 hours and no longer than 48 hours. If gum were to stay in there longer than that then it's constipation and that's not unique to gum. Now if you were to have a large wad of gum, perhaps, I don't know, because your fraternity brothers made you swallow 17 packs of gum to prove your loyalty to the frat, and that baseball-sized gummy wad is clogging up your "pipes", then maybe you can get your fraternity to pay for your surgery, and prove how loyal the frat is to its brothers.

Meanwhile, normal amounts of chewing gum pose no real threat. Acne is common to teenagers, and teenagers are known to for their voracious appetites, including chocolate and fried foods. But other than that connection, there's no evidence that the two are related.

Common Medical Misconceptions

Acne happens when the skin has too much of a waxy natural oil called sebum. Hormonal teenagers tend to have this problem, so some scientists think that hormones are the culprit but no one really knows just yet why teenagers get bad acne. Eating chocolate and fried foods can however circulate oils in the body and cause distention in the skin.

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It's called getting fat. You may handle frogs or toads and you may get warts, but the two aren't normally connected. The wart-like lumps occasionally found on frogs aren't warts at all, they are glands. And amphibian glands aren't contagious.

ASK DOCTOR MIKE: MEDICAL MYTHS EXPOSED FT. MYLIFEASEVA

Warts are contagious though, but not like that. Warts are a viral infection transmitted by skin-contact, such as when broken skin or a wound comes in contact with the human papilloma virus. Common skin warts are from any of different types of HPV. Frogs aren't particularly clean though. And there are a lot of germs and bacteria you can get if you handle frogs on a regular basis.

So it's still a good idea to wash your hands regularly, whether you've been playing around with lumps of HPV or with a bunch of frogs. Venereal diseases cannot live long outside of the body, and especially not on a cold hard toilet seat or bus seat. Some diseases can spread by skin to skin contact however like herpes, genital warts, and pubic lice crabs.

And some diseases like herpes, oral gonorrhea, and chlamydia can by caught from kissing including deep kissing since kissing can transfers saliva and trace amounts of blood. Now, bathrooms aren't exactly sanitary, especially handles and floors. But surprisingly, the toilet seat is the cleanest public thing in the bathroom.

Medical myths even some doctors believe. - PubMed - NCBI

You could eat off of it, not that anyone in their right mind would do so. This myth seems to have arisen among women and pubescent boys; the women because they didn't want their body hair to grow back in thick stubble and the boys because they do want thick stubble. In fact, shaving or cutting the hair does nothing to thicken the individual hairs. Instead, the hair regrows at the same regular rate and shape each time. The hair may feel thick or tough when it's stubbly because it's still imbedded in the skin and less flexible than the portions of hair further removed from the follicle.

Even if your leg hair is so tough you need a weed-eater, rest assured that shaving won't make it worse. Sneezing seems to pause everything in your body, but not even a big sneeze can keep your heart from beating. The electrical signal telling your heart to beat works just fine while you are sneezing. Sneezing can however cause a momentary irregularity in your heartbeat since sneezing affects blood flow and that may be how this myth arose. Now, you can confidently say, even after a violent sneezing fit that "My heart will go on.

Sneezes can erupt at a speed of mph but eyes and nose aren't connected like that. That pressure won't affect your eye socket. The pressure can affect your nose, throat, sinuses, and lungs but your eyes are too secure in their eye sockets to go anywhere. If you don't believe me, you can test this myth too by sniffing inside a used vacuum cleaner bag till you start sneezing. But I wouldn't recommend it. Your body has a remarkable ability to regenerate cells.

Every 30 days or so, your epidermis replaces every surface cell of your skin. Intestinal lining, and some "high use" areas can regenerate even faster. Other organs aren't as quick to reproduce. But, for whatever reason, the rumor has spread that brain cells don't regenerate. Perhaps this myth arose to scare rascally youth away from various brain-damaging revelries. It has been proven however, by Researchers at Cornell University, that brain cells do regenerate at least in the portion of the brain responsible for learning and memory: the hippocampus.


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Now the study only demonstrated regrowth in one portion of the brain. This breakthrough is no cause for drunken revelry. This myth suggests that men can't get breast cancer because they don't have breasts. It is true that men don't get breast cancer as often as women. However, men do have mammary glands and some are fairly developed due to a condition called gynecomastia.

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In rare cases, some men are even able to lactate. So men do have some breast tissue wherein breast cancer can occur. Almost 2, men in were diagnosed and almost died from breast cancer.