Human body contains millions of cells; it grows divides and dies in conventional manner. Sometimes the system goes wrong and uncontrolled no of cells grows, which leads to cancer. The cancer cells combine and form extra mass tissue known as tumor. Cancer is a common disease which spreads throughout the blood stream in the human body.

Cancer induced weight loss can adversely affect response to treatment and survival.  Therefore, good nutrition is important for cancer patients.  Eating the right kinds of foods before, during, and after cancer treatment can help the patient feel better and stay stronger.  Also, it helps to maintain a healthy body weight, maintain strength, and reduce side effects of treatment.  A healthy diet includes eating and drinking enough of the foods and liquids that have important  nutrients (vitamins, minerals, protein, carbohydrates, fat, and water) the body needs.