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Nutrition & Cancer Care
Comprehensive clinical nutrition guidelines for cancer care, treatment symptom management, weight loss prevention, muscle preservation, and protein requirement calculation at Cancer Institute (WIA), Adyar.
Introduction
Nutrition plays a vital role in comprehensive cancer care. Cancer and its treatments, including surgery, chemotherapy, radiotherapy, immunotherapy, and targeted therapy, can affect appetite, digestion, nutrient absorption, and metabolism, increasing the risk of weight loss, muscle wasting, and malnutrition.
Adequate nutrition provides essential energy, protein, vitamins, minerals, and fluids to maintain muscle mass, support immunity, promote tissue repair, improve treatment tolerance, and enhance recovery and quality of life.
Early nutritional assessment and individualized dietary intervention can help manage treatment-related symptoms such as nausea, poor appetite, taste changes, mouth sores, constipation, diarrhoea, and swallowing difficulties.
Therefore, nutrition should be an integral part of cancer care from diagnosis through treatment, recovery, rehabilitation, and survivorship. Oncology nutritionists play an important role in assessing nutritional needs, providing dietary guidance, and supporting patients and caregivers throughout the cancer journey.
Nutrition During Treatment Modalities
Targeted nutritional adjustments designed to alleviate common acute side effects and maintain treatment continuity.
Nutrition during chemotherapy:
Chemotherapy can cause nausea, vomiting, taste changes, mouth sores, and bowel changes. Good nutrition helps maintain energy, strength, immunity, and tissue repair.
Eat small, frequent meals instead of large meals.
For nausea: choose bland foods like toast, crackers, rice, and oatmeal; ginger may help.
For taste changes: try cold/room-temperature foods and plastic utensils for metallic taste.
For mouth sores: choose soft, moist, non-spicy foods such as yogurt, scrambled eggs, porridge, and mashed vegetables.
For diarrhea: choose low-fiber foods and maintain fluids/electrolytes.
For constipation: gradually increase fiber and fluids.
Nutrition During Radiotherapy:
Radiotherapy side effects depend on the treatment area and may cause dry mouth, difficulty swallowing, mouth pain, bloating, or diarrhea.
Choose soft, moist, calorie- and protein-rich foods.
For dry mouth or swallowing difficulty: use gravies, sauces, broths, and fluids.
Avoid spicy, acidic, very hot, and rough-textured foods.
For abdominal/pelvic radiation with diarrhea: temporarily choose a low-fiber, low-fat diet and maintain hydration.
Gradually return to a balanced diet as symptoms improve.
Good nutrition helps maintain weight, strength, and recovery.
Nutrition Before & After Cancer Surgery:
Before Surgery:
Focus on a high-protein, calorie- and nutrient-rich diet.
Include eggs, lean meat/fish, yogurt, nuts, and whole grains.
Follow the surgical team’s instructions for fasting and carbohydrate loading.
After surgery:
Start with fluids and easily digestible foods as tolerated.
Gradually increase protein to support wound healing and strength.
Include eggs, fish, yogurt, soft vegetables, fruits, and healthy fats.
Slowly return to a balanced, fiber-rich diet as digestion improves.
Goal: Maintain weight, promote healing, strength, and recovery.
Specialized Practical Nutrition Handbooks
Select a clinical guide below to view in-depth guidance on weight control, muscle maintenance, or daily protein targets.
Managing Weight Loss During Cancer Treatment
Unintentional weight loss during cancer treatment may result from poor appetite, nausea, taste changes, mouth sores, swallowing difficulties, gastrointestinal symptoms, fatigue, or cancer-related changes. Adequate nutrition supports recovery, preserves muscle, and may improve treatment tolerance. Report unexplained weight loss promptly.
Warning Signs
Looser clothing or visible muscle loss
Reduced appetite or intake
Increasing weakness or fatigue
Difficulty eating, swallowing, or performing daily activities
Persistent vomiting or diarrhea
Practical Nutrition Strategies
Eat five or six small meals or snacks, such as upma with milk or curd, banana with yogurt, rice or roti with dal and paneer or tofu, smoothies, khichdi, or milk at bedtime if tolerated. Adapt choices to symptoms, preferences, culture, and nutritional needs.
Prioritize protein from dal, pulses, chickpeas, rajma, soy, tofu, paneer, milk, curd, nuts, seeds, eggs, fish, chicken, or lean meat. ESPEN recommends more than 1 g/kg/day and, when appropriate, up to 1.5 g/kg/day, based on individual needs.
Make meals nutrient-dense by adding milk powder, paneer, tofu, curd, nut or seed paste, fortified soups, porridges, and protein-rich snacks.
Manage symptoms with small, bland meals for nausea; soft, moist foods for mouth sores; mashed or pureed foods for swallowing difficulty; varied temperatures and mild seasonings for taste changes; and adequate fluids for diarrhea. Report persistent symptoms.
Seek Help Early
Consult an oncology dietitian if intake is poor or weight loss continues. Supplements may help when meals are insufficient and should complement food unless advised otherwise.
Caregiver Support
Offer small meals, keep nutritious foods available, respect preferences, avoid pressure, assist with preparation, monitor intake and weight when advised, and report concerns.
Activity and Muscle Preservation
When medically appropriate, gentle and resistance exercise may help maintain strength and muscle. Exercise should be individualized.
Contact the Oncology Team If the Patient:
Continues to lose weight
Eats very little for several days
Has persistent vomiting or diarrhea
Has difficulty chewing or swallowing
Develops severe mouth sores
Has increasing weakness or muscle loss
Cannot maintain adequate fluid or nutritional intake
Key Messages
Monitor weight, appetite, and intake.
Manage symptoms that interfere with eating.
Fortify meals with energy and protein.
Offer small, frequent portions.
Preserve muscle with protein and appropriate activity.
Seek nutrition support early.
Conclusion
Managing weight loss requires adequate nutrition, muscle preservation, symptom management, and timely professional support. An oncology dietitian can help create an individualized plan. Good nutrition supports comprehensive cancer care.
Need Individualized Nutrition Guidance?
Every patient’s metabolism, treatment phase, and tolerance are unique. Schedule a one-on-one session with our certified oncology nutritionists for personalized meal planning and symptom management.