If you are someone who has a big mouth, chew on this—and spread the word. Research from the US National Cancer Institute suggests that eating an extra serving of fruit or vegetables per 1,000 calories consumed may reduce rates of mouth, head, and neck cancers by up to six percent. The British Dental Health Foundation has swallowed this news hard, urging UK citizens to nosh on more fruits and veggies in hopes of reducing the 5,000 mouth-cancer cases reported in the country annually. The study found that people eating six portions of produce daily, compared to the recommended five, were 30 percent less likely to develop an invasive oral illness.