Cancer-related fatigue is often exacerbated if you don’t eat enough food or don’t eat right, and maintaining a good supply of nutrients can help you feel better and have more energy. You may have a poor appetite due to cancer, but some of the following goals are recommended: Meet your basic calorie needs. Eat more protein. Protein rebuilds and repairs damaged body tissue. If you have had surgery or other cancer treatments, you may need more protein to help your body heal and fight off infections, and you will need to consult with your doctor for professional advice on your exact protein intake. The best sources of protein include dairy foods (milk), eggs, and meat (lean meat, fish, or poultry). Drink plenty of water. Consult your doctor for specific fluid needs. Drinking fluids can include water, juice, milk, broth, milkshakes and other beverages. If you have side effects of treatment such as vomiting or diarrhea, you will need to hydrate more. Drink at least 8 cups of fluids a day to prevent dehydration, and you may need to increase your fluid intake in hot, dry climates. Make sure you are getting enough vitamins. If you’re not sure if you’re getting enough vitamins from food, consult your doctor for vitamin supplements. But vitamins are not a substitute for adequate food intake, and as with all medications, you should consult your doctor before taking vitamins or other supplements. Make an appointment with a dietitian. A dietitian can advise you on your dietary needs, the type of illness, and digestive symptoms such as feeling full after eating, nausea, difficulty swallowing, or changes in taste. The dietitian can also suggest ways to maximize nutrition and include more nutrients in a smaller amount of food.