7 Sept 2025 · 2 min
Brian Johnson breaks down David Perlmutter's argument that grains and sugar damage your brain, causing inflammation and cognitive decline. Perlmutter claims cutting carbs protects against dementia and improves mental clarity. Johnson shares how the diet works and why he follows it.
Hi, this is Brian. Welcome back to heroic wisdom daily. Today's book Grain Brain by Dr. David Perlmutter. A bold medical backed challenge to conventional wisdom arguing that grains, sugar and high carb diets may be quietly damaging your brain long before symptoms appear. Check out the notes for the full story. My favorite Big Ideas here's your one minute summary. Carbs and Grains can fuel inflammation Perlmutter suggests that refined carbohydrates and even whole grains can trigger chronic inflammation linked to cognitive decline and brain disease. I can tell you I used to have migraines. Eliminated migraines went away. For some people grains work. For others they do not. Gluten may breach your brain. He highlights the impact of gluten on gut permeability leaky gut suggesting it may negatively affect brain health via the gut brain axis. Again, as always, check out the notes for more Good Fats are fuel, not foe Contrary to outdated beliefs, healthy fats can provide brain vitality and help lower inflammation. Refined sugar disrupts brain function. Excess sugar not only saps focus and mood, but may accelerate decline, slashing cognitive clarity and spiking disease risk. And you can rewire your brain with dietary choices. Adopting a lower or low carb gluten free brain supportive Diet as outlined in his four week plan can lift your mood, sharpen your mind and protect against neurological conditions. Your brain already carries the blueprint for wellness. So what's one shift you can make today to feed it with what it truly needs? As you consider that, consider checking out the notes on Georgia EAD's book Change youe Diet, Change youe Brain. One the world's leading nutritional psychiatrist and one of my absolute favorite teachers. Hope you enjoy. Have a great day.
