Meat, Dairy and Cancer Immunity: Why the TVA Study Caught My Attention

Commentary by Maurice Massey, Founder, Bridgett Renee Health
Published October 31, 2026 · Revisiting research published in 2023

Can a nutrient in animal foods influence the immune cells that recognize cancer? A University of Chicago study offers an intriguing reason to keep asking that question—and to distinguish promising biology from proven dietary treatment.

What the researchers found

The study, published in Nature on November 22, 2023, examined trans-vaccenic acid (TVA), a fatty acid found in foods from ruminant animals, including beef, lamb, milk and butter. TVA enhanced the activity of CD8+ T cells, immune cells that can recognize and destroy abnormal cells.

In mouse experiments, TVA-enriched diets slowed the growth of melanoma and colon tumors and helped these immune cells enter tumors. In laboratory work, researchers traced an effect through the GPR43 receptor and CREB signaling pathway. Think of this as changing a cellular signal so that the T cells can do their job more effectively.

The team also analyzed blood samples from people receiving CAR-T immunotherapy for lymphoma. Higher circulating TVA was associated with better treatment responses. That observation does not establish that eating more meat caused the improvement.

My perspective: why this matters to the diet conversation

I have been open about my interest in a carnivore approach to nutrition. Meat is a consistent part of that dietary pattern, so research into a compound naturally present in animal foods immediately gets my attention.

What interests me here is the question underneath the headline: how do the components of the foods we eat communicate with the body? Nutrition is more than a list of calories. I want the conversation to leave room for serious investigation of animal foods and the compounds they contain.

From my perspective, findings like these are a reason to stay curious, ask better questions and look closely at the evidence. They help explain why I do not dismiss animal foods from the wellness conversation. But my support for a carnivore approach is my coaching perspective; this particular study cannot establish the benefits of that whole dietary pattern.

I also work with raw-food approaches and combinations of raw and animal foods. I believe the discussion should stay centered on the individual, their circumstances and what can actually be assessed. A compelling research finding should open a conversation, not become a promise to someone facing cancer.

What this study does—and does not—establish

This was not a clinical trial of a carnivore diet. It does not show that carnivore eating, meat or dairy cures cancer, prevents recurrence or improves survival in people. A nutrient studied under controlled conditions is different from an entire diet.

The researchers emphasized studying the nutrient itself and determining an appropriate amount. The findings do not establish a human cancer-treatment dose of TVA, a supplement recommendation or a target intake of meat or dairy. Their report also notes that plant-derived compounds may have related immune effects.

A useful question for your care team

If you are receiving cancer treatment, ask: “How can my nutrition support my strength and treatment needs, and does this research have any relevance to my situation?” Discuss major dietary changes or supplements with your oncology team and an oncology dietitian. Food choices and wellness coaching should not replace prescribed cancer care.

For a conversation about your wellness goals, learn about our cancer support coaching or book a free 20-minute phone introduction.

Read the sources

• Fan H, Xia S, Xiang J, et al. Trans-vaccenic acid reprograms CD8+ T cells and anti-tumour immunity. Nature 623, 1034–1043 (2023). DOI: 10.1038/s41586-023-06749-3.
• University of Chicago News: Study: Nutrient found in meat and dairy improves immune response to cancer. December 1, 2023.

Independent educational commentary. Bridgett Renee Health is not affiliated with the University of Chicago or the study authors. Wellness coaching does not provide medical diagnosis or cancer treatment.