ASCO 2026: Why Nutrition Is Key to Survival For mTNBC Patients

When someone is diagnosed with metastatic triple-negative breast cancer (mTNBC), the main focus is usually on systemic medications to slow disease progression and manage symptoms. However, new research presented at the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting suggests that nutrition could also play an important role in improving survival.

Dr. Vaishali Deenadayalan, a hematology and oncology fellow, led a study of 1,644 patients to show how common protein-energy malnutrition (PEM) is. This condition occurs when the body does not receive adequate nutrition during treatment. The study suggests that good nutrition may be just as important for long-term survival as medical treatments.

Nutrition as Its Own Important Factor

The study included many patients receiving standard chemotherapy for mTNBC. Almost half of them (46.3 percent) had protein-energy malnutrition.

The researchers found that patients with malnutrition had much lower one-year survival rates than those who were well-nourished.

Dr. Deenadayalan explained why these results are important:

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“I concluded my study saying that protein-energy malnutrition is an independent factor associated with worse one-year overall survival. And this becomes very important in current time as we are looking at more advances and more clinical trials looking at effective therapies; it becomes more optimal to address other additional factors which could help improve the overall survival other than just your medications or chemotherapy.”

The study also found that Black patients were more likely to have protein-energy malnutrition. This highlights the need to make sure everyone has equal access to supportive care.

How to Take Charge of Your Care

One key takeaway from this research is that patients often wait for their doctors to bring up diet. Dr. Deenadayalan encourages patients to speak up and take an active role in managing their nutrition.

1. Talk About Appetite Changes

Do not assume your care team knows you are having trouble unless you tell them. If you cannot keep food down or your appetite has decreased, let them know.

“Patients should be more empowered to not just report the medical symptoms like pain or fatigue, but also any change in the nutritional habits. If they are not able to keep down food, that’s a significant piece of information which the physician needs to know, and then we can work around to see how we can help them,”  Dr. Deenadayalan tells BlackDoctor.

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2. Focus on Manageable Support

While more research is being done on nutrition as part of treatment, Dr. Deenadayalan suggests aiming for steady, high-quality nutrition. This means:

• Protein and Fiber: Try to eat nutrient-rich foods, especially those high in protein and fiber.
• Safe Preparation: Choose fruits and vegetables that are both cooked and clean.
• Graded Exercise: Physical activity can help, but it should match how you feel during treatment. “We do realize that patients might be sick when they’re receiving chemotherapy, so graded exercise based on their tolerance… would be helpful in the overall treatment plan,” As Dr. Deenadayalan says.

3. Ask for Help with Symptoms

Malnutrition often occurs as a side effect of treatment. If nausea or vomiting makes it hard to eat, ask your care team for help managing these symptoms. Staying strong is important for your recovery.

What’s Next: Research and Advocacy for the Future

The conversation about nutrition in cancer care is changing.  Dr. Deenadayalan’s research urges the medical community to look beyond just how well drugs work and to consider the whole patient experience.

Some future steps based on this research include:

• Patient-Centered Insight: Researchers are now creating questionnaires to better understand what patients wish they had known about nutrition support early in their diagnosis.
• Defining Support Needs: The team wants to determine exactly which support services patients need from their care teams to help them maintain better nutrition.
• Integration in Trials: Most importantly, Dr. Deenadayalan hopes this is just the start. The goal is to ensure future Phase 3 clinical trials include a specific nutrition arm, with patients receiving structured dietary support alongside their medications.

By making these interventions official, the medical community hopes to make nutrition a standard, evidence-based part of cancer care.