7 Health Myths Your Doctor Wishes You Didn't Believe

Vitamin A is essential for good vision —no one's debunking that—but you only need a small amount. One half-cup of raw carrots will provide you with 184 percent of the recommended daily value. An excessive amount of beta carotene, the compound in carrots that's converted to vitamin A, can not only make your skin turn orange, but studies show it has also been associated with an increased risk of lung cancer in some people. So enjoy the crudité, but if you worry that your eyesight is failing, make an appointment with an optometrist or an eye doctor.