1. Chewing gum takes seven years to pass through your digestive tract.
The truth: Gum addicts can relax. Although your body can’t digest chewing gum, it doesn’t just sit in your stomach, according to Snopes.com. You eliminate it when you go to the bathroom just like other food you haven’t digested.
2. Plucking a gray hair causes two to grow back.
The truth: It’s fine to tweeze that errant hair. Genetics plays a key role in when you go gray, regardless of how often you pluck. It can take six months from the time a hair falls out until it grows back long enough for you to notice it; during that time, you’ll automatically see more gray hair as part of the aging process, explains Snopes.com.
3. Antiperspirant deodorants cause breast cancer.
The truth: Going au naturel won’t protect your breasts from cancer. This myth probably came about because some antiperspirants contain aluminum, which can show up as a false-positive finding on a mammogram. All this means is you should skip the white stuff before a breast cancer screening. Though concerns have been raised about parabens in deodorant raising estrogen levels — and thus possibly increasing cancer risk — there’s never been any conclusive evidence to prove a link, according to the National Cancer Institute and FDA.
4. Cats can steal the air from a baby’s mouth.
The truth: There’s no need to send Fluffy away when baby moves in. This myth dates back hundreds of years to an era when cats were associated with evil spirits and witchcraft, but KidsHealth.org notes that it’s anatomically impossible for a cat or other animal to suffocate a baby by sealing the infant’s mouth with its own. Still, it’s a good idea to supervise pets around babies and small children — for the kitty’s safety just as much as the child’s.
5. Mountain Dew can shrink a man’s testicles.
The truth: Mountain Dew-drinking guys everywhere can breathe a sigh of relief. The gist of this ridiculous rumor, according to Snopes.com, is that drinking Mountain Dew can lower a man’s sperm count or cause his penis to shrink. The alleged culprit is food coloring Yellow No. 5, and the myth that it has a harmful effect on the male reproductive system is unfounded, the site says.