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:

“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.

Clinical Considerations: Addressing Nutrition Early in mTNBC Care

Dr. Deenadayalan’s ASCO presentation reinforces the importance of assessing nutritional status as part of routine management of mTNBC. With nearly half of patients in the study experiencing protein-energy malnutrition and malnutrition independently associated with one-year survival, nutrition screening should be considered alongside treatment planning and symptom management.

Here are some practical strategies clinicians can use to implement nutrition into patient care:

• Proactively screen for nutrition-related concerns to help identify patients at risk of malnutrition.
• Address treatment-related barriers to adequate nutritional intake through supportive care services, symptom management, and referral to oncology dietitians.
• Consider equity-related factors, including social determinants of health, food access, and transportation challenges.

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.

Are you a healthcare professional? Register with us today!