A nutritionist specializes in all things nutrition. They provide information to individuals regarding dietary healthy and wellness. Nutritionists specialize in the study of nutrition deficiencies, nutritional values of certain foods and the importance of nutrition and diet for well being. Dietitians are nutritionists who work directly with patients in a hospital or nursing home facility. Wellness Centers has a directory of local nutritionists and local dietitians so that you can find a registered dietitian in your area.