Nutrition and cancer

Food as support, not a battle

During cancer treatment, eating can start to feel complicated. Your body may respond differently to food. Some days you may feel hungry, other days the thought of eating can feel heavy or even uncomfortable. 

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If no one has said this to you yet, let me do so clearly: you don’t have to eat perfectly to support your body. You only need to eat enough to keep your strength up. Right now, food isn’t about strict health rules; it’s about nourishment, comfort, and helping your body do the healing work it’s already trying so hard to do.

Many people tell me they feel guilty when they can only manage toast or a cracker. But here’s the truth: every small bite still counts. Even a few sips of a smoothie, half a yoghurt, or a single soft scrambled egg can give your body protein and energy that it can use. Think in terms of gentle nutrition rather than perfect meals.

Why eating enough matters during treatment?

Your body is incredibly busy during treatment. It repairs cells, manages inflammation, and works to maintain muscle and immune function. This means it needs protein and energy regularly. When energy or protein intake drops too low for too long, the body is forced to use your muscle stores for fuel. This is when fatigue increases, muscle strength begins to drop, and treatment can start feeling even harder.

To help prevent this, aim for small amounts of protein throughout the day. This could be a boiled egg, a few spoons of cottage cheese, a small piece of fish, a little chicken, baked beans, lentil soup, or even a nourishing shake if eating feels like too much. Try not to wait for hunger to guide you completely. 

During treatment, hunger cues can be unreliable. Instead, think of eating like taking small medicine doses throughout the day, calmly and without pressure.

When appetite changes and food feels difficult

It can be unsettling when food that you once enjoyed suddenly feels unfamiliar. Treatment can change taste, smell, and appetite. If this is happening to you, it ‘s not your fault and it’s not a sign that you’re doing anything wrong. It’s simply your body adapting and reacting.

Easy tips to try

• If strong smells bother you, try cooler foods like yoghurt, fresh fruit, cold pasta salad, or a smoothie. Cold foods often release fewer aromas and can feel easier on the stomach.
• If meat tastes metallic, try softer proteins like eggs, chicken, baked fish, hummus or beans that are gently seasoned. Don’t use metal knives or forks. 
• If large meals feel overwhelming, focus on small offerings. A few bites every two hours is often more manageable than a plate of food three times a day.
• If taste feels muted or dull, squeeze a little lemon over your food or add fresh herbs to bring gentle flavour back.

You don’t need to force large meals. Instead, think comfort. Can you manage half a banana with peanut butter? A spoon of yoghurt? A small piece of cheese?A cup of soup? These small moments of nourishment truly help.

Honouring energy levels

Tiredness during treatment is real and deeply valid. Planning meals or cooking can feel like climbing a mountain on certain days. It’s okay to simplify. Use what makes life easier: ready-made soups, pre-cut fruit, soft cooked vegetables, or store-bought smoothies are all acceptable options. Let loved ones help. 

Keep a basket of easy snacks close to where you rest. Things like small tubs of yoghurt, fruit puree, crackers with cheese, soft muffins and nut butters can provide energy with little effort. If you have energy at one time of the day, use that moment to prepare something small that you can warm later. These little acts of self-care add up.

Myths and food fear

There is a lot of info out there about what you should or shouldn’t eat during treatment, which can feel frightening. Remember, food isn’t your enemy. You don’t need to follow extreme diets or cut out entire food groups, unless your medical team specifically advised it. You deserve to feel safe around food.

Truths

• You don’t need to remove every bit of sugar from your diet to heal.
• Enjoying small treats can provide emotional comfort, which also matters.
• Dairy, soya, and grains can all fit into a nourishing cancer-friendly eating pattern unless you have a personal intolerance or allergy.
• You’re allowed to eat in a way that feels realistic and calm, not rigid or fearful.

When eating feels emotional

Food is more than fuel. It carries memories, comfort, and emotion. During treatment, you may feel detached from food, while others use it as a source of comfort. Both are understandable. Offer yourself compassion in these moments. If a food brings you a moment of peace, it has value. If a food feels too heavy today, leave it and try again tomorrow.

Small wins matter

Every sip, every bite, every gentle choice is worth acknowledging. Instead of focusing on what you can’t manage right now, notice the things you’re doing. You took a sip of water. You nibbled on a cracker. You tried something new even when your appetite was low. These are quiet yet powerful acts of resilience.

If eating feels hard, reach out. Your dietitian is there to adapt your plan with you, not to judge what you can or can’t eat. You deserve personalised support from someone who understands the emotional and physical journey of eating during cancer.

Meagan Atcheson is a clinical dietitian, specialising in oncology nutrition and complex clinical care. She focuses on quality of life, managing treatment-related symptoms, and empowering patients through every phase of cancer care with structured yet gentle nutrition guidance.