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Sugar and Cancer, Frequently asked Questions FAQ’s

October 9, 2018

Woman on dieting for good health concept. Close up female using hand push out her favourite donut and choose green apple and vegetables for good he...

FAQ:  I have been diagnosed with cancer—should I avoid sugar?

If you have been diagnosed with cancer and have been searching the Web for useful information regarding what you should and should not eat, you may have seen the widely discussed assertion that “sugar feeds cancer.”

The truth is that all cells, whether healthy or cancerous, run on sugar (glucose).  Sure, this glucose can come from sweets and soda. However, our bodies can also make glucose from any carbohydrate-containing foods we eat, including nutrient-rich vegetables, fruits, whole grains, beans, legumes, and dairy products. Additionally, proteins consumed from food are also converted to glucose, as needed, when carbohydrate stores in the body are low.

In most cases, there is no reason to cut out carbohydrate-containing foods, especially those that are healthy, because of a concern about feeding cancerous cells.

FAQ:  What kind of diet is best for me?

If you are able to eat normal volumes of food and maintain your weight, it is best to eat as healthfully as possible.  This includes lots of fruits and vegetables, whole grains, lean proteins, low-fat dairy, and some healthy oils. It also includes limiting sugary foods and soft drinks, fatty foods, and overly processed choices.

If your appetite is poor, it is important to ensure that you are getting enough calories and protein to keep your body as strong as possible during treatment. In this case, we ask that you not limit foods or caloric beverages that may be appealing to you.  Additionally, it would be appropriate for you to choose an oral supplement drink that includes protein, fiber, and healthy fats rather than one that is a good source of protein but low in calories and carbohydrates.

FAQ:  What about sugar and carb intake if I am diabetic?

During cancer treatment, it may be appropriate to relax your normal restrictions on consuming sugary foods and carbohydrates so that you can get enough calories to maintain your weight.  In this case, it is recommended that you work with your physician to adjust and manage your medications to control blood sugar.


Sugar and Cancer FAQsIf you are a Virginia Cancer Specialists patient and have any questions at all regarding your eating or nutrition, call the main Virginia Cancer Specialists Central Scheduling line to make an appointment to meet with one of our dietitians for an approach that is personalized to you.


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About Virginia Cancer Specialists

Virginia Cancer Specialists, the largest private cancer practice in Northern Virginia, was recognized in 2024 and 2025 as the #1 physician practice in Virginia with the most Castle Connolly top doctors in cancer care and across all medical specialties. It features a world-class treatment team fighting cancer and diseases of the blood, offering access to the most current treatment protocols, clinical trials, and comprehensive care. Its fully staffed, comprehensive clinical research program also includes a dedicated research facility for Phase I clinical trials—the Virginia Cancer Specialists Research Institute, the largest of its kind in the Mid-Atlantic region. The practice offers medical oncology, radiation oncology, musculoskeletal tumor surgery, breast surgery, thoracic surgery, genetic counseling, palliative care, oncology nurse navigators, oncology infusion nurses, oncology pharmacists, social workers, dietitians, and laboratory technicians. Virginia Cancer Specialists is part of The US Oncology Network. This collaboration unites the practice with more than 1,400 independent physicians and research and data from thousands of cancer patients in clinical trials across the country. Virginia Cancer Specialists also participates in clinical trials through US Oncology Research, which has played a role in more than 100 FDA-approved cancer therapies. For more information, visit USOncology.com. For more information about Virginia Cancer Specialists, visit: VirginiaCancerSpecialists.com

The Network is supported by McKesson Corporation, a global leader in healthcare solutions.

SOURCE Virginia Cancer Specialist

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