Eating well during cancer treatment

Cancer treatment can turn eating into a challenge. Side effects change how food tastes and dull your appetite. They make it hard to get enough calories. But the right nutrition can help you feel stronger and recover better.

Here's why it matters. Your body needs more fuel than usual during treatment. Cancer can speed up your metabolism while shrinking your appetite, and that mix can lead to malnutrition. In fact, an estimated 50% of people are malnourished at the time of their cancer diagnosis.

That's where oncology nutrition comes in. It focuses on helping you get the calories, protein and fluids your body needs — before, during and after treatment.

Why nutrition matters during treatment

Your body needs extra protein and calories to keep your strength up, repair tissue and support your immune system. Without enough calories and protein, your body may break down muscle for fuel. That can slow your recovery and lower your resistance to infection.

Common eating challenges

Cancer and its treatments can affect your taste, smell, appetite and ability to absorb nutrients. Side effects vary, but common ones include:

• Loss of appetite
• Nausea and vomiting
• Changes in how food tastes
• Dry mouth or mouth sores
• Trouble swallowing
• Feeling full after small amounts
• Diarrhea or constipation

Sound familiar? You're not alone. The good news: Small changes can make a real difference.

Simple ways to eat well

You don't have to overhaul your diet. Start with a few steady habits:

• Eat high-protein foods first, when your appetite is strongest — think Greek yogurt, eggs, fish or nut butters
• Try five or six small meals throughout the day instead of three large ones
• Drink most of your fluids between meals, not with them — small sips at mealtime are fine
• Moisten foods with sauces, gravies or dressings if your mouth is dry or sore
• Sip water throughout the day and aim for eight or more cups
• Stock up on foods you know you can eat, even on hard days

If cooking smells trigger nausea, keep cold, odorless foods on hand. And if you're struggling to eat for more than a few weeks, tell your care team. That's a sign it's time to get support.

When to see a registered dietitian nutritionist

You don't have to figure this out alone. A registered dietitian nutritionist (RDN) can look at your needs and provide personalized guidance that fits your life and your treatment. They can help you manage side effects, prevent unwanted weight changes and make sure you get the nutrients your body needs.

The American Cancer Society recommends starting nutrition screening and counseling as soon as possible after diagnosis. If you're at risk for poor nutrition, your doctor can refer you to an RDN for personalized guidance.

At Sutter, we're here to help. Dietitians are part of your cancer care team — ready to help you keep your strength up and manage appetite changes during treatment. You can also ask us about a nutrition consult at your first oncology visit