Management

General Nutrition Guidelines During Cancer Treatment

A healthy diet can help you feel better and stay stronger. It can also decrease side effects and support your immune system’s fight against cancer. The foods you choose to eat during cancer treatment will vary depending on side effects you're having. Overall, try to make food choices that give you enough fluid, calories, protein, and nutrients, such as vitamins and minerals. Calories will help you maintain your weight. Protein will help you rebuild tissues that cancer treatment may harm. Nutrients and fluids are vital for your body to work well.

These tips from the National Cancer Institute may help if you have problems eating or lose your appetite during cancer treatment:

  • Eat small, frequent meals throughout the day. Choose foods that sound good to you.

  • Eat high-protein and high-calorie foods including snacks.

  • Keep snacks on hand. Good choices are peanut butter crackers, cheese, nuts, granola bars, or dried fruit. 

  • Stay away from empty calorie foods, like soda.

  • To prevent nausea and eat more, don't drink liquids with your meals. Make sure to stay hydrated by sipping liquids throughout the day.

  • Try to eat when you are feeling the best, no matter what time of day.

  • Try high-calorie, high-protein drinks when you don't feel like eating.

  • Try to increase your appetite through light exercise.

  • Talk with your doctor about appetite stimulants, if needed.

  • Add extra calories and protein to food using foods like protein powder, butter, skim milk powder, honey, or brown sugar.

  • Sit up or keep your head raised for at least 1 hour after eating.

  • Eat foods at room temperature.

  • Stay away from fatty or spicy foods or foods with strong odors.

  • Ask your doctor for antinausea medicines if these changes in your eating strategies aren't enough.

Tell your health care providers about any eating problems you're having. They can often be treated. A registered dietitian can also help you figure out what to eat to get the nutrients you need.

Featured in

Online Medical Reviewer: Jessica Gotwals RN BSN MPH

Online Medical Reviewer: Susan K. Dempsey-Walls RN

Date Last Reviewed: 06/01/2025

© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
Related Articles
Read article
Oncology
Cancer and Nutrition: Foods to Manage Diarrhea

During cancer treatment, you need enough calories and protein. But the foods you choose can also help you cope with side effects of cancer and its treatment. Here's what you need to know.

Read article
Oncology
Infusion for Cancer Treatment: 10 Things to Bring with You

Packing a personal care bag of items can help you stay calm and comfortable. It can change your infusion experience for the better. Here are 10 things to put into your bag before you go to the infusion clinic.

Read article
Oncology
Life After Cancer: Lymphedema

Lymphedema is swelling in part of the body that may occur after cancer surgery or radiation. It's an ongoing (chronic) condition that has no cure. But you can do things to help reduce your risk for lymphedema.

Read article
Oncology
Nutrition During Chemotherapy

During chemotherapy, the energy provided by a healthy diet can help you rebuild normal cells. It can also help you keep up your strength and fight infection. These guidelines can help.