Full show notes: BenGreenfieldLife.com/limitlessdaily

In this episode, you'll hear repeat guest Jim Kwik talk about cognitive offloading and where the line sits between using your phone as a second brain and letting your own memory go slack. We dig into the MIT study that scanned essay writers' brains and found the ChatGPT group remembered the least of what they wrote, what London cabbies' brains looked like before satellite navigation, why movement drives brain-derived neurotrophic factor (BDNF), and why racket sports and dance sit at the top of the longevity list. You'll also learn Jim's BUILD framework for using AI as a critic rather than an answer machine, how to write an affirmation your brain will not immediately reject, the white bear effect that makes "don't check your phone" the least useful instruction you can give yourself, why the 15 to 45 minutes of sleep inertia after you wake carries more weight than any other window in your day, and the four daily basics Jim ranks above every device in his house. We close with the 40 Hz gamma protocol I now use in the early afternoon, and the surprising effect it's had on how quickly I fall asleep at night. All of this comes straight out of Jim's new book, Limitless Daily, designed to give you one simple, actionable lesson each day for an entire year.

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Full show notes:<a href="https://bengreenfieldlife.com/limitlessdaily"> BenGreenfieldLife.com/limitlessdaily</a>
In this episode, you'll hear repeat guest<a href="https://www.instagram.com/jimkwik/"> Jim Kwik</a> talk about cognitive offloading and where the line sits between using your phone as a second brain and letting your own memory go slack. We dig into the<a href="https://arxiv.org/abs/2506.08872"> MIT study</a> that scanned essay writers' brains and found the ChatGPT group remembered the least of what they wrote, what<a href="https://www.pnas.org/doi/10.1073/pnas.070039597"> London cabbies' brains</a> looked like before satellite navigation, why movement drives brain-derived neurotrophic factor (BDNF), and why<a href="https://pubmed.ncbi.nlm.nih.gov/30193744/"> racket sports and dance</a> sit at the top of the longevity list. You'll also learn Jim's BUILD framework for using AI as a critic rather than an answer machine, how to write an affirmation your brain will not immediately reject, the<a href="https://pubmed.ncbi.nlm.nih.gov/3612492/"> white bear effect</a> that makes "don't check your phone" the least useful instruction you can give yourself, why the 15 to 45 minutes of<a href="https://www.sleepfoundation.org/how-sleep-works/sleep-inertia"> sleep inertia</a> after you wake carries more weight than any other window in your day, and the four daily basics Jim ranks above every device in his house. We close with the<a href="https://www.nature.com/articles/s41422-023-00920-1"> 40 Hz gamma protocol</a> I now use in the early afternoon, and the surprising effect it's had on how quickly I fall asleep at night. All of this comes straight out of Jim's new book,<a href="https://amzn.to/4ysbiAF"> Limitless Daily</a>, designed to give you one simple, actionable lesson each day for an entire year.
Episode Sponsors:
Tecton Ketones: Bioidentical D-beta-hydroxybutyrate (BHB), the same ketone molecule your body makes in ketosis, for clean cognitive support and stable energy with no conversion step. Visit<a href="https://tectonketones.com/ben"> tectonketones.com/ben</a> and use code BEN for 16% off your first order.
ULTRA: A clean, nicotine-free, caffeine-free pouch that delivers smooth energy and focus from clinically backed nootropics and adaptogens, with no jitters or crashes. Visit<a href="https://takeultra.com"> takeultra.com</a> and use code BENGREENFIELD for 15% off.
Forkful: Chef-cooked, ready-to-eat meals made with grass-fed bison, wild-caught salmon, and fresh vegetables, zero seed oils, no prep and no cleanup, ready in under 3 minutes. Visit<a href="https://forkfulmeals.com"> ForkfulMeals.com</a> and use code BEN50 for 50% off your first order.
Just Thrive: The Gut Essentials Bundle pairs a probiotic clinically proven to arrive 100% alive in your gut with Digestive Bitters, 12 science-backed herbs that support digestion and GLP-1 production. Visit<a href="https://justthrivehealth.com/BEN"> justthrivehealth.com/BEN</a> and save 20% with promo code BEN.

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