Nutritional Guidelines for Individuals Undergoing Cancer Treatment

Good nutrition is a cornerstone of supportive care for anyone receiving cancer treatment. While each persons needs are unique, there are evidencebased strategies that can help manage side effects, maintain strength, and support healing.

1. General Principles

• Energy needs may increase. Fatigue, infection risk, and healing all raise calorie requirements.
• Protein is essential for tissue repair. Aim for 1.21.5g of protein per kilogram of body weight per day, or higher if you have severe weight loss.
• Stay hydrated. Aim for 810 cups of fluid daily, adjusting for vomiting, diarrhea, or medicationinduced diuresis.
• Small, frequent meals. Eating every 23hours can be easier than three large meals.
• Focus on nutrientdense foods. Choose whole grains, lean proteins, dairy or alternatives, fruits, and vegetables.

2. Managing Common Treatment Side Effects

A. Nausea & Vomiting

• Eat bland, lowfat foods (e.g., rice, toast, applesauce).
• Consume calories as liquids if solids are intolerablesmoothies, broths, or fortified shakes.
• Avoid strong odors, fried foods, and very spicy dishes that can trigger nausea.
• Try ginger tea or ginger capsules (consult your team first).

B. Loss of Appetite

• Offer favorite foods, even if not perfectly healthy.
• Add calorierich toppingsnut butter, cheese, avocado, or olive oil.
• Heat foods to a pleasant temperature; warm meals often smell more appealing.
• Consider oral nutrition supplements (e.g., Boost, Ensure) for extra calories.

C. Taste Changes & Mouth Sores

• Use plastic or stainless steel utensils to avoid metallic tastes.
• Rinse mouth gently with a mild saltwater solution after meals.
• Choose soft, moist foodsmashed potatoes, scrambled eggs, oatmeal.
• Season with mild herbs (basil, parsley) instead of strong spices.

D. Diarrhea

• Follow the BRAT diet (Bananas, Rice, Applesauce, Toast) temporarily.
• Stay hydrated with oral rehydration solutions or clear broths.
• Limit highfiber, greasy, and spicy foods until symptoms improve.

E. Constipation

• Increase fluid intake and aim for at least 5 servings of fiberrich foods daily (whole grains, beans, fruits, vegetables).
• Incorporate natural stool softenersprunes, figs, or a small amount of olive oil.
• Gentle physical activity, such as short walks, can stimulate bowel movements.

3. Food Safety During Treatment

Cancer therapy can lower immunity, making foodborne infections a greater risk.

• Cook meats, poultry, eggs, and seafood thoroughly (internal temperature165F /74C).
• Avoid raw or undercooked eggs, sushi, unpasteurized dairy, and unwashed produce.
• Store leftovers promptlyrefrigerate within two hours and consume within three days.
• Wash hands, surfaces, and utensils with hot, soapy water before preparing food.

4. Tailored Nutrient Recommendations

Protein Sources

• Lean meats: chicken, turkey, lean beef.
• Fish (especially fatty fish for omega3s): salmon, sardines.
• Dairy or fortified plant milks: Greek yogurt, cottage cheese, soy milk.
• Plantbased: lentils, chickpeas, tofu, tempeh, nuts, seeds.

Healthy Fats

• Olive oil, avocado, nut butters, flaxseed, chia seeds.
• These add calories without increasing volumea benefit when appetite is low.

Vitamins & Minerals

Most patients should obtain nutrients from food, but supplementation may be needed after a deficiency is identified.

• Vitamin D & calcium important for bone health, especially if steroids are used.
• Iron monitor if anemia develops; iron supplements only under medical advice.
• Vitamin B12 may be required for patients on certain chemotherapy agents.
• Probiotics can help with diarrhea, but discuss with the oncology team first.

5. Sample OneDay Meal Plan (2,200kcal, 110g protein)

• Breakfast (450kcal) 1 cup oatmeal cooked with cup soy milk, 1 tbsp almond butter, sliced banana, and a sprinkle of cinnamon; 1 boiled egg.
• Midmorning snack (200kcal) Smoothie: cup Greek yogurt, cup frozen berries, 1 tbsp ground flaxseed, 1 tsp honey, water to blend.
• Lunch (600kcal) Grilled chicken breast (120g) over mixed greens, cup quinoa, chopped cucumber, cherry tomatoes, 2 tbsp oliveoil vinaigrette; a small wholegrain roll.
• Afternoon snack (150kcal) 1 small apple with 1 tbsp peanut butter.
• Dinner (700kcal) Baked salmon (150g) with lemon, cup mashed sweet potatoes (mixed with a tsp butter), steamed broccoli drizzled with olive oil; cup brown rice.
• Evening snack (200kcal) cup cottage cheese topped with sliced peach and a drizzle of honey.

6. When to Seek Professional Help

• Unintentional weight loss of >5% in a month.
• Persistent vomiting, diarrhea, or constipation that interferes with nutrition.
• Severe mouth sores, taste changes, or loss of appetite lasting more than two weeks.
• Signs of dehydration (dark urine, dizziness, dry mouth).

Registered dietitians specializing in oncology can provide individualized meal plans, monitor nutritional status, and adjust supplements as needed.

7. Practical Tips for Everyday Life

• Prepare grabandgo meals in advance when you feel better.
• Keep highcalorie snacks (trail mix, cheese sticks, protein bars) within reach.
• Use a food diary or an app to track intake and identify patterns.
• Involve family or friends in cooking to reduce burden and increase menu variety.
• Stay active within tolerancelight stretching or short walks can improve appetite.

8. Key Takeaways

• Prioritize protein and calories, but listen to your bodys cues.
• Address side effects early; small adjustments often prevent larger nutritional gaps.
• Food safety is critical during immunosuppression.
• Professional nutrition support is a standard part of comprehensive cancer care.

Nutrition during cancer treatment is a dynamic process. By staying informed, planning ahead, and collaborating with your healthcare team, you can help your body cope with therapy, maintain strength, and improve overall quality of life.