How To Build A Better BRAIN (+ Ketamine, Nicotine, Alcohol & More!) With Dr. Tommy Wood.

In this episode of the Boundless Life podcast, host Ben Greenfield sits down with neuroscientist Dr. Tommy Wood to explore the transformative power of how we use our brains. Drawing from Wood's book *The Stimulated Mind*, the conversation centers on the core thesis that brain function is not predetermined but shaped by our daily experiences and environmental stimuli. Wood emphasizes that the brain is a product of its environment, with early life experiences and ongoing cognitive engagement being critical for long-term brain health. He challenges reductionist approaches in neuroscience, arguing that understanding the brain requires looking at the whole system rather than isolated parts. Practical strategies for enhancing brain function include engaging in complex, skill-based activities like music, language, and sports, as well as incorporating both aerobic and resistance training to stimulate different brain regions. The discussion also covers the role of nutrition, sleep, and lifestyle factors, including the potential benefits of ketones, lactate production from intense exercise, and the nuanced effects of substances like alcohol, nicotine, and ketamine. Wood stresses that while some substances may offer acute cognitive boosts, long-term brain health depends on consistent, meaningful engagement and a balanced, stimulating lifestyle. The episode concludes with a forward-looking perspective on AI, framing it as either a cognitive prosthetic or orthotic—depending on how we use it—and advocating for deep interaction with AI tools to preserve and enhance human cognitive skills. Key takeaways include: (1) Your brain adapts to how you use it—train it for the skills you want to master; (2) Complex, unpredictable activities (like music, sports, or obstacle courses) offer the greatest cognitive benefits; (3) Both aerobic and resistance training improve brain structure and function, with intensity and lactate production playing a key role; (4) Avoid passive use of AI—use it as a tool to enhance, not replace, your own thinking; (5) Lifestyle factors like sleep, nutrition, and social engagement are foundational to brain health; (6) Substances like nicotine and alcohol have complex effects—moderate use may not harm, but dependency or overuse can impair function; (7) The brain remains plastic throughout life, but only if you continue to challenge it. Overall, the episode delivers a hopeful, actionable blueprint for building a resilient, high-performing brain at any age.