Food and nutrition during a terminal illness

Why does appetite change during serious illness?

Appetite changes are almost universal in people with a serious illness and are caused by multiple overlapping factors. The illness itself produces inflammatory signals that suppress appetite. Many treatments, including certain medications and chemotherapy, directly affect taste, smell, nausea thresholds, and appetite signals. Fatigue reduces the energy required to prepare and eat food. Anxiety and depression, common in serious illness, also suppress appetite.

This is not a choice or a failure. It is the physiology of serious illness. Understanding this helps both the person with the illness and the carer approach food without guilt or pressure.

Does eating little and often help?

When appetite is reduced, three standard meals a day is often too much to manage. Small amounts of food every two to three hours is typically better tolerated than large meals. This approach also helps with nausea, which is often worse when the stomach is either very empty or very full.

Focus on nutrient density rather than volume. Small portions of high-calorie, high-protein foods provide more nutrition than large portions of low-calorie foods. Eggs, full-fat dairy, nut butters, avocado, and fortified cereals can all provide significant nutrition in small amounts.

What do I do when appetite is very low?

On days when eating feels genuinely impossible, do not force it. Forcing food on someone whose body is not signalling hunger is unlikely to be effective and can damage the relationship around food. Offer small amounts of preferred foods gently and without pressure.

Liquid nutrition can be easier to take than solid food, particularly if fatigue or nausea is high. Commercial nutritional supplements like Ensure or Sustagen can provide calories and protein in a small volume. Smoothies, soups, and broths are also easy to take.

Keeping the mouth clean and moist matters even when eating is not possible. Mouth care (cleaning teeth, rinsing with water, using a damp sponge on the lips) maintains comfort and reduces the risk of infection.

Why does food taste different during treatment?

Some treatments cause significant changes in how food tastes. Common changes include a metallic taste, a general blunting of flavour, heightened sensitivity to bitter tastes, or foods that were previously enjoyed now tasting unpleasant. This can be distressing for both the person with the illness and for carers who are trying to cook favourite meals.

Practical strategies: stronger flavours (citrus, herbs, vinegar) often cut through treatment-related taste blunting better than mild flavours. Cold or room-temperature food often tastes better than hot food when metallic taste is a problem. Using plastic utensils instead of metal can help with metallic taste. Marinating meat and protein can improve palatability.

Ask the palliative care team or a dietitian for specific advice based on the individual's situation. Taste changes are manageable in many cases with the right strategies.

How do I manage nausea and food?

Nausea is common and often manageable. If nausea is consistently affecting the ability to eat, tell the treating team. There are effective anti-nausea medications, and the right one depends on the cause of the nausea. Do not accept untreated nausea as unavoidable.

Foods that are generally well tolerated when nausea is present: plain crackers, dry toast, ginger (tea or biscuits), cold or room-temperature foods, bland foods with minimal smell. Foods to avoid: fatty or fried foods, strong smells during cooking, and large meals.

Eating in a well-ventilated space, avoiding cooking smells by opening windows or having someone else prepare food, and not lying flat immediately after eating can all help.

How do I support someone who is not eating?

One of the most important things a carer can do around food is follow the lead of the person they are caring for. Ask what sounds appealing, not what you think they should eat. Offer without pressure. Do not measure success by how much was eaten.

Mealtimes can continue to be social and meaningful even when the person cannot eat much. Sitting together, talking, sharing the ritual of a meal matters beyond the nutrition.

As the illness progresses and particularly in the final weeks, reduced eating is a natural part of the process. The body is reducing its energy needs. This is not something food can fix, and continuing to push eating can cause distress. Your palliative care team will guide you through this transition when it comes.

Should I ask for a referral to a dietitian?

If nutrition is a significant concern, ask for a referral to a dietitian. An accredited practising dietitian (APD) with experience in oncology or palliative care can provide personalised advice based on the specific illness, treatment, and individual preferences.

A dietitian can advise on: managing specific treatment-related side effects, appropriate nutritional supplements, enteral nutrition if oral eating becomes very difficult, and how to support nutrition without creating pressure or conflict.

Ask your GP, specialist, or palliative care team for a referral. Healthdirect (healthdirect.gov.au) also has information on finding an accredited practising dietitian and what to expect from your first appointment. Dietitian services at major hospitals are often included as part of multidisciplinary care. In private practice, Medicare rebates for dietitian services are available under a Chronic Disease Management plan from your GP.