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How cancer treatment can affect nutrition

Nausea, loss of appetite, changes in taste and fatigue are common side effects of cancer treatment. As a result, some people may experience unintended weight loss.

Maintaining an adequate intake of energy, protein, vitamins and minerals is important to help meet the body's nutritional needs during treatment.

Changes that can influence nutritional status during cancer and cancer treatment¹

  • Loss of appetite
  • Changes in your sense of taste
  • Inflammation of the mucous membranes, known as mucositis
  • Pain or difficulty swallowing or chewing
  • Nausea or vomiting
  • Digestive problems, such as constipation or diarrhoea
  • Tiredness or fatigue
  • Low mood or depression
  • Unintended weight loss

Look after your wellbeing and stay active

A cancer diagnosis and treatment can bring a range of emotions. It is normal to have good days and difficult days. Looking after your emotional wellbeing can help you remain engaged with the people and activities that matter most to you.

  • Talk to family, friends or trusted support people about how you are feeling. Sharing your thoughts and concerns may help ease the emotional burden.
  • Stay as active as you can. Gentle activities such as walking, cycling or light exercise, where appropriate, can help maintain muscle strength, support digestion and promote overall wellbeing.
  • Work closely with your healthcare team. Your doctors, nurses, dietitians and other healthcare professionals can provide guidance, support and practical strategies to help manage the effects of treatment and maintain your wellbeing.

1 Muscaritoli M, Arends J, Bachmann P, et al. ESPEN Practical Guideline: Clinical Nutrition in Cancer. Clinical Nutrition. 2021;40(5):2898-2913.