So here are a few of those so-called old wives tales and what modern science thinks of them.

  • Fish is brain food. Sharron Coplin's a professor of nutrition at Ohio State University, and she says this one is true. Fish is a good source of Omega-3 fatty acids, which is important in the development of the brain. Omega-3 fatty acids also reduce plaque in the arteries, so there's better blood flow to the brain. This helps make you smarter and more alert. Fish also contains B vitamins that help with memory.
  • Stress and spicy food cause ulcers. This one's a no-go, according to Dr. Cynthia Yoshida. She's the director of the Women's Gastrointestinal Clinic at the University of Virginia. Ulcers are caused by a bacteria called H. Pylori. You can also get an ulcer by over doing the anti-inflammatory drugs like Advil and Aleve. But spicy foods won't burn a hole in your stomach, even when that's what it feels like. And even though stress'll do a number on your health, it won't give you an ulcer.

And the last old wives' tale we're going to debunk: Don't cross your eyes! They'll stay that way! According to Dr. Anne Sumers - the spokesperson for the American Academy of Ophthalmology - that one's just plain silly. You'll look funny with your eyes crossed, but your pupils will straighten out just fine. People who do have crossed eyes aren't being punished for making faces. Their eyes are crossed because of faulty messages from the brain. Now you know!