Malnutrition and weight loss

Many side effects may make eating difficult, which can cause you to lose weight. Even a small drop in your weight (e.g. 3–4 kg), particularly over a short period of time, may put you at risk of malnutrition. You can be malnourished even if you are overweight.

Significant weight loss and malnutrition can reduce your strength, energy and quality of life. This can affect how you respond to treatment, and side effects may be more severe and your recovery slower. During treatment and recovery, a dietitian can assess whether a feeding tube will help you maintain or gain weight.

For more on this, see Nutrition and cancer.

Listen to our podcasts on Appetite Loss and Nausea and Managing Cancer Fatigue

How to prevent unplanned weight loss

• Treat food like medicine: something you have to have in order to feel better.
• Eat 5–6 small meals rather than three large ones each day.
• Include high-energy and high‑protein foods at every meal or snack. For example, drink milk rather than water and choose cheese and biscuits over lollies.
• Try ready-to-use nutritional supplement drinks. Examples include Sustagen, Ensure and Resource. Many pharmacies and supermarkets sell these specially formulated drinks. You don’t need a prescription.
• If you are having trouble swallowing, talk to a speech pathologist for advice on thickening the supplement.
• Keep a selection of snacks handy, e.g. in your bag or car.
• Talk to your doctor, nurse or dietitian if you are losing weight, or if you have pain or discomfort when swallowing.