#1 Muscle turns to fat if you don't use it: FALSE!

Muscle and fat are two distinct tissues that don't convert into each other. When you stop exercising, muscles shrink and allow for fats to slide into their place. People who stop exercising also tend to consume the same number of calories they did when they were working out, which means fewer calories out and probable weight gain. And since muscle mass increases the metabolic rate, less muscle means you're more likely to put on fat weight if you're eating more and exercising less. All three factors give the illusion of muscle turning to fat. The good news is moderate physical activity can prevent this from happening.

#2 Women get drunk faster than men: TRUE!

Women's bodies have a lower percentage of water than men's and, therefore, reach a higher blood alcohol concentration faster. And that's not all. Women have half the amount of gastric alcohol dehydrogenase, a compound that breaks down alcohol. The amount of alcohol metabolized by a woman's liver and stomach is only about 20% of the amount men metabolize. Because women aren't as efficient in digesting alcohol, a greater amount of alcohol hits the bloodstream and goes straight to the brain.

#3 Alcohol kills brain cells: FALSE!

People who drink on a regular basis, even if they drink heavily, aren't slaughtering gray matter. Studies show that damage to human cells occurs only when alcohol is consumed in extremely high concentrations, and the blood alcohol concentrations that make people drunk are far lower than the concentrations lethal to cells. A person would likely stop breathing as a result of respiratory suppression before imbibing anywhere near the amount that damages cells.

But remember that, though it doesn't actually kill cells, heavy alcohol consumption can cause long-term damage by disrupting the message-carrying nerve connections (dendrites) attached to neurons in the cerebellum. And while alcohol itself doesn't result in the death of brains cells, other aspects of heavy drinking, including lack of attention to health and diet, can. So remember: While alcohol may not kill brain cells, it can harm your health over time.

#4 A cup of Green Tea helps you lose weight faster: FALSE!

Lately, everyone's touting the benefits of green tea, from improved digestion to better brain function. However, in many cases there is little scientific evidence to support the claims. For example, green tea is chock full of catechins, compounds with antioxidant properties that supposedly speed up the metabolism and help you burn off fat. Unfortunately, the levels of energy expenditure they generate are too small to promote any significant weight loss. On the plus side, one study showed that men who took a special green tea extract containing 690 milligrams of catechins - 20 times the amount in a typical cup of green tea - lost two pounds more than those who didn't take the extract. So massive amounts of green tea extract might serve as a weight loss aid, but a cup or two a day isn't going to make any significant difference.