Berries may be helpful in the prevention of chronic disease, including cancer and heart disease. Fruits in general, and berries in particular, have the ability to suppress cancer cell growth in vitro and to reduce DNA damage induced by mutagenic agents present in cooked meat. Strawberries and raspberries can reverse precancerous oral or esophageal lesions. This anti-cancer activity occurs through mechanisms going from boosting natural killer cell activity to inhibiting angiogenesis. Though berries do not seem to lower cholesterol, they may reduce heart disease risk by keeping our platelets in an inactivated state.