Though orange juice is packed with vitamin C, women should switch to eating the fruit. "A lot of people drink their calories," says the Cleveland Clinic's Dr. Linda D. Bradley, who explains that obese women are two to four times more likely to develop uterine cancer. And what juice drinkers gain in sugar and calories, they lose in fiber. "Fiber makes you feel more full," she says. As an added benefit: a 2007 study shows that a high-fiber diet cuts the risk of breast cancer by 50 percent.