You Can Grow Your Brain. Here’s How.

In this episode of The Next Big Idea, host Rufus Griscom explores the revolutionary science of neuroplasticity with Dr. Majid Fatui, author of The Invincible Brain. The conversation dismantles the long-held myth that intelligence and brain capacity are fixed by genetics, revealing instead that the brain can grow and improve at any age through lifestyle choices. Fatui outlines five pillars of brain health—exercise, sleep, nutrition, stress reduction, and brain training—each of which can physically alter the brain, increasing the size of the hippocampus, boosting neurogenesis, and building cognitive reserves. The episode emphasizes that these changes are not just theoretical: studies show measurable brain growth in just 12 weeks of consistent exercise, and lifestyle interventions can even reverse early-stage Alzheimer’s. Griscom reflects on his own journey toward better brain health, highlighting the transformative power of small, daily habits like walking, mindful eating, and focused breathing. The episode concludes with a hopeful vision of the future, where Alzheimer’s is treated not as an inevitable fate but as a preventable condition through proactive, holistic lifestyle changes.