It’s hard these days to know if what you read or hear is true, especially when you’re surfing the internet. When it comes to health-related information, the stakes are high and it’s important to discern fact from fiction.

With that in mind, the website Everyday Health has exploded 10 common health myths. Here are a few gems they tackled, from the somewhat serious — Will swallowing chewing gum harm my digestive tract? — to the just plain goofy — Can a cat steal a baby’s breath?

Myth: You can catch a cold from being outside too long. In fact, going outside can help you keep from catching a cold. Colds are caused by viruses or bacteria, which are spread in the winter by being in close contact with everyone indoors.

Myth: Antiperspirant deodorants cause breast cancer. Some antiperspirants contain aluminum, which can show up as a false-positive finding on a mammogram. The solution is to not apply any before having a breast cancer screening.

Myth: It’s OK to follow the five-second rule for dropped food. Wrong. If there are bacteria on the floor, they will attach to food immediately. Just toss the tainted food away.

And, yes, chewing gum that’s been swallowed eventually will pass through your system, just like any other undigested food. No, cats can’t steal your baby’s breath. Plucking a gray hair won’t cause two more to grow back, and cracking your knuckles won’t give you arthritis.

As for those who say we only use 10 percent of our brains, if this were true, you could injure various parts of your brain without any consequences. You’re using 100 percent of your brain. What you do with it, however, is up to you.