It is very important to maintain proper nutrition before, during, and after cancer treatment. Such treatments may involve:

• Radiation therapy
• Chemotherapy
• Hormone therapy
• Biological immunotherapy 
• Surgery. 

These procedures and medications can cause many individuals to lose their appetite and energy, putting them at an increased risk for malnutrition. The main goals of medical nutrition therapy are:

• Try to keep your weight constant
• Maintain the energy to cope with all the new challenges of treatments
• Helps repair body tissue and maintain a healthy immune system
• Heal properly