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Dr. Kurt Bravata identifies the foods and substances universally harmful to human health — from HFCS and seed oils to alcohol, lectins, and gluten.
Kurt Bravata, M.D. · Educational, not a substitute for your physician.
Not all dietary advice is created equal. But in Live Free or Diet, Dr. Kurt Bravata identifies a category of foods and substances that are harmful to virtually everyone.
"Modern diets are full of processed foods that contain trace amounts of toxins and irritants that are not meant for human consumption." — Kurt Bravata, M.D., Live Free or Diet
HFCS went from 1% of sweeteners in the U.S. in the 1970s to 42% by 2004. Dr. Bravata explains: "High-fructose corn syrup goes straight to your liver, which then converts it into fat... leading to a condition known as nonalcoholic fatty liver disease (NAFLD)."
"Although typically labeled as heart healthy, vegetable and seed oils are high in inflammatory fats and produce free radicals that can promote discomfort and disease."
"Humans were not designed to consume alcohol, which is why there are no EtOH (ethanol) receptors in the human body."
Alcohol produces euphoria by triggering beta-endorphins — but what you don't feel right away is the liver damage, systemic inflammation, and brain atrophy that accumulates with regular use.
When the gut is chronically inflamed, gap junctions between intestinal cells break down. Dr. Bravata: "In this setting, we are more likely to absorb these toxins, irritants, and allergens into our bloodstream, causing chronic pain, fatigue, mental fog, and more serious disease."
Want the full picture? Live Free or Diet by Dr. Kurt Bravata, M.D. is available at [livefreeordietbook.com](https://livefreeordietbook.com) and on [Amazon](https://www.amazon.com/dp/9798385040568).
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Nutrition · August 31, 2026
Dr. Bravata compares the most popular diets — keto, Atkins, Paleo, Mediterranean — and explains how to find the sustainable approach that fits your life.
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