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  2. Jul 1, 2026

Billy Bob Thornton Quit Dairy. Should You? | Dr. Neal Barnard

Billy Bob Thornton Quit Dairy. Should You? | Dr. Neal Barnard

Acclaimed actor Billy Bob Thornton stopped eating dairy after discovering it was causing health problems. But is that a healthy decision?

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Dr. Neal Barnard joins Chuck Carroll on The Exam Room Podcast to separate fact from fiction.

How common are dairy allergies? And could milk and cheese be behind symptoms such as bloating, stomach pain, fatigue, skin issues, congestion, brain fog, or feeling sick after eating?

Dr. Barnard explains the difference between a true dairy allergy, lactose intolerance, and dairy sensitivity. He also discusses what PCRM research shows about dairy, saturated fat, cancer risk, heart health, and the health benefits of choosing dairy alternatives.

Then we look at Thornton's wheat sensitivity. What is a true wheat allergy? How is it different from celiac disease or gluten sensitivity? And when should someone get tested before removing gluten from their diet?

Plus, Billy Bob Thornton also said he eats for his AB-negative blood type. Dr. Barnard explains how rare AB-negative blood is, what the research actually says about blood-type diets, and whether blood type should determine what you eat.

In this episode:
  • Billy Bob Thornton’s dairy-free and wheat-free diet
  • Dairy allergy vs. lactose intolerance
  • Common symptoms of dairy intolerance
  • How quickly symptoms may improve after removing dairy
  • PCRM research on dairy and health risks
  • Best plant-based dairy alternatives
  • Wheat allergy vs. celiac disease vs. gluten sensitivity
  • Gluten-free diets and when they are necessary
  • AB-negative blood type statistics
  • The truth about blood-type diets
  • Dr. Barnard’s research on plant-based diets and blood type

This episode is sponsored by The Gregory J. Reiter Memorial Fund, which supports organizations like the Physicians Committee that carry on Greg’s passion and love for animals through rescue efforts, veganism, and wildlife conservation.

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