A Practical Nutrition Guide During Chemotherapy

Why Nutrition Matters During Chemotherapy

During chemotherapy, eating well is not only about calories. Nutrition supports immune function, tissue repair, energy, and the ability to continue treatment as planned.

Key goals include:

• Supporting immune cells with protein, zinc, and other nutrients
• Helping normal tissue recover after treatment-related stress
• Maintaining weight and muscle so the body has reserves
• Reducing side effects such as nausea, fatigue, and mouth sores when possible

1. Eating When Nausea Is Present

Nausea and vomiting are common chemotherapy side effects. The goal is to keep some intake going without forcing large meals.

Try these habits:

• Eat small amounts often, such as 6 to 8 small meals per day
• Avoid lying down for 30 to 60 minutes after eating
• Eat slowly and take breaks
• Choose cooler foods if smells trigger nausea
• Keep bland snacks nearby, such as crackers or toast

Foods that are often easier:

| Food | Why it may help | |------|-----------------| | Crackers or toast | Bland, dry, and easy to nibble | | Rice porridge | Soft and gentle on the stomach | | Banana | Easy to digest and provides potassium | | Ginger tea | May help some people with nausea | | Cold fruit | Less smell and helps with hydration |

Foods to limit when nausea is strong:

• Fried or greasy foods
• Very spicy foods
• Strong-smelling meals
• Very sweet drinks
• Hot foods with strong aromas

2. Protein When Appetite Is Low

When appetite drops, prioritize foods that provide more protein in smaller portions.

Helpful options:

1. Eggs - easy to prepare and high-quality protein
2. Tofu - soft, flexible, and gentle
3. Chicken breast - lean protein when tolerated
4. Greek yogurt - protein plus probiotics
5. Soft tofu - easy to swallow
6. Fish - protein and omega-3 fats
7. Beans and lentils - plant protein and fiber
8. Nut butter - calorie-dense and easy to add
9. Cheese - protein and calcium in small amounts
10. Milk or soy milk - drinkable protein

Many patients need roughly 1.2 to 1.5 grams of protein per kilogram of body weight each day, but your care team or dietitian can personalize this.

3. Foods That Support Immune Health

Chemotherapy can lower immune cells. Food cannot replace medical care, but it can support the body.

Important nutrients include:

Vitamin C

• Bell peppers, kiwi, strawberries, broccoli, citrus

Zinc

• Beef, pumpkin seeds, tofu, seafood when safely cooked

Selenium

• Eggs, tuna, Brazil nuts in small amounts

Beta-glucans

• Oats, barley, mushrooms

Probiotics

• Yogurt or fermented foods, but check with your doctor if your immunity is low

4. Foods to Avoid When Immunity Is Low

Food safety matters more during chemotherapy.

Avoid:

• Raw fish, raw shellfish, steak tartare, raw eggs
• Undercooked meat or runny eggs
• Unpasteurized juice, milk, or soft cheeses
• Food left at room temperature for too long
• Street food or foods with uncertain hygiene

Ask your care team before taking high-dose supplements. Some antioxidants and herbal products may interfere with treatment.

5. Hydration Tips

Fluids support kidney function and help the body process treatment.

Common goals:

• About 1.5 to 2 liters per day, unless your doctor gives a different limit
• Sip small amounts often if nausea is strong
• Keep a bottle nearby and drink regularly

Options:

• Water
• Barley tea or caffeine-free tea
• Clear soups
• Water-rich fruits and vegetables
• Oral nutrition drinks if recommended

Limit alcohol, and ask your care team about caffeine if dehydration is a concern.

6. Eating With Mouth Sores

When the mouth or throat is sore:

• Choose soft foods such as porridge, tofu, mashed potato, yogurt, or smoothies
• Try cool or room-temperature foods
• Avoid acidic foods such as orange juice or tomato
• Avoid spicy, salty, or rough-textured foods
• Use a straw if it helps reduce contact with sore areas

Closing

During chemotherapy, the goal is not a perfect diet. The goal is to eat what you can, safely and consistently, while getting support when eating becomes difficult.

If weight loss, dehydration, or severe nausea continues, talk with your doctor or a registered dietitian.