. >> still ahead, we speak to deborah norville of "inside edition." and very good news for fruit lovers. how eating a lot of berries can keep your brain running sharp. and dr. kim hammonds is here to answer your pet questions. >> and berries might help boost brain function. researchers in boston analyze data from a nurses' health study tracing food consumption among thousands of women since the mid-1970s's. those who regularly ate a diet rich in blueberries and strawberries delayed their cognitive aging. although the results could be influenced by other factors, dietitians say and the oxygen- rich areas remain one of the best foods in nature. a health-related reason to eat large quantities of guacamole. with the assistance of the avocado board, researchers are learning more about the health benefits of avocados. there is preliminary evidence that group made a heart health and play a role in type 2 diabetes and weight management. avocados may also help the body absorb nutrients. still to come, we talk live to the anchor of "inside edition," deborah nor