Nutrition is the provision, to cells and organisms, of the materials necessary (in the form of food) to support life. Many common health problems can be prevented or alleviated with good nutrition.
Nutritional science investigates the metabolic and physiological responses of the body to diet. The course presents you with the relevant aspects of human nutrition, meal planning, economics, preparation,physiology, public health, biochemistry and psychology. 
You can work as a Clinical dietician in private Clinics,Hospitals,Sports Clinic & Center.You can also open your own Clinic to provide advice as a Clinical dietician.