Dietitians promote good dietary health and treat nutritional problems by providing practical advice about food choices, based on scientific research. The ability to interact well with people from a wide range of backgrounds is essential. Dietitians work on a group and an individual basis with people of all ages. Dietitians are uniquely qualified to translate scientific information about nutrition and food into practical dietary advice. As well as providing impartial advice about nutrition and health, dietitians also advise about food related problems and treat disease and ill health.