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How to Improve Your Memory & Cognitive Function at Any Age | Dr. Alan Castel

Huberman Lab

Hosted by Andrew D. Huberman

2h 28m
Transcript

Original podcast

Summary

Written by a model from the transcript; not yet reviewed.

In this episode, Dr. Alan Castel joins the show to discuss human memory, cognitive aging, and what makes some older adults perform like people decades younger. The guest and host explain why memory is a reconstructive and subjective process rather than a video recording, why errorful trial and corrective feedback improve learning better than rote repetition, and how beliefs about aging directly influence cognitive decline. They also examine superagers, the science of curiosity, the value of physical exercise and balance training, and why midlife often represents a low point in life satisfaction that gives way to greater contentment later in life.

  • Engage in retrieval practice by drawing or testing yourself before looking at information to significantly improve your long-term memory. 0:17
  • Walk three to four times a week to increase the volume of the hippocampus and enhance declarative memory as you age. 52:14
  • Practice balancing on one leg for ten seconds to assess and maintain cerebellar health and prevent dangerous falls. 55:18
  • Recognize that your subjective sense of age is a stronger predictor of longevity than your actual biological age. 1:17:10

Chapters

  1. 0:35
    Podcast Introduction and Host Overview

    Andrew Huberman opens the episode, introduces himself and his guest, Dr. Alan Castell, and outlines the main themes of memory and cognition.

  2. 1:14
    Practical Memory Enhancement Techniques

    The hosts provide actionable strategies—such as deliberate practice, varied learning contexts, and active engagement—to boost memory retention and learning efficiency.

  3. 2:00
    Memory Across the Lifespan and Superagers

    Dr. Castell explains how memory changes with age, the concept of superagers, and practical protocols to maintain or improve cognitive function.

  4. 2:45
    Defining Memory and Its Reconstructive Nature

    Dr. Castell explains memory as a mental representation that is inherently reconstructive and often inaccurate, setting the stage for deeper exploration.

  5. 4:55
    Mnemonic Strategies and Their Limitations

    The discussion turns to common mnemonic techniques, such as name‑to‑fruit pairings, and why they can be inefficient and error‑prone.

  6. 6:23
    Everyday Memory and Selective Forgetting

    The conversation shifts to everyday memory demands, such as remembering hotel maps, and the adaptive benefits of selective forgetting.

  7. 8:32
    Closing Reflections on Memory and Learning

    The episode concludes with a synthesis of key insights, emphasizing the role of curiosity, active learning, and emotional engagement in sustaining memory across ages.

  8. 9:06
    Active Retrieval and Error‑Based Learning

    The hosts highlight the importance of making mistakes and retrieving information to strengthen memory, using the Apple logo example.

  9. 10:50
    Sponsor Interludes and Their Relevance

    Brief sponsor messages for Wealthfront, Helix Sleep, and AG1 are interspersed, offering practical tools related to finance, sleep, and nutrition that support cognitive health.

  10. 44:34
    Car Safety and Prospective Memory

    Explores how routine habits can lead to dangerous lapses, such as leaving infants in hot cars, and discusses the importance of prospective memory in everyday safety.

  11. 46:42
    Scuba Diving and Skill Decay

    Highlights the risks of outdated skills in activities like scuba diving and driving, emphasizing the need for regular refresher training.

  12. 48:29
    Memory Decline and Repetition in Aging

    Examines why older adults often repeat stories or jokes, linking it to changes in source memory and the role of nostalgia and oral history.

  13. 53:06
    Physical Exercise and Hippocampal Health

    Details a study showing that regular walking can increase hippocampal volume and improve memory, underscoring exercise as a key intervention for aging brains.

  14. 1:00:00
    Balance, Falls, and Cognitive Aging

    Discusses how balance training can reduce fall risk, the link between falls and cognitive decline, and the importance of both physical and mental balance in older adults.

  15. 1:16:35
    Subjective Age and Health Outcomes

    Explores the concept of subjective age, its predictive power for longevity, and how perceived age influences health behaviors and attitudes.

  16. 1:18:18
    Role Models and Successful Aging

    Considers how mentors, family, and public figures inspire successful aging, and the importance of role models in shaping healthy aging trajectories.

  17. 1:19:55
    Goal Setting and Purpose Across Life Stages

    Explores how setting short‑term and long‑term goals, especially in academia, can motivate and guide individuals through different life phases.

  18. 2:10:19
    Podcast Intro and Host Greeting

    The episode opens with the host welcoming listeners and setting the stage for a discussion on memory and cognitive function.

Highlights

  • 3:04

    Memory Is Reconstructiveinsight

    Memory is not a video recording but a mental representation of the past that changes and reconstructs over time. People can witness the exact same event and remember it entirely differently days later.

  • 8:15

    Errors Improve Learningstrategy

    Making mistakes and struggling to recall information before seeing the correct answer creates desirable difficulties that lead to superior learning compared to simply reviewing material repeatedly.

  • 19:29

    The Dangers of Routinesinsight

    People walk past fire extinguishers or take the same commute every day without noticing their surroundings until a disruption occurs. Violating daily habits and routines forces the brain to actively engage with the environment.

  • 52:41

    Hippocampal Growth From Walkingdata

    Randomized studies show that older adults who walk three to four times a week increase their hippocampal volume by one percent and significantly improve memory performance over a year.

  • 54:43

    The One-Leg Balance Teststrategy

    One in four adults over 65 experiences a fall, yet most people overestimate their balance. Standing on one leg for ten seconds with eyes open and closed reveals hidden balance deficits that can be easily trained.

  • 1:04:44

    The Midlife Happiness Dipdata

    Research indicates that life satisfaction and happiness follow a curvilinear path, with midlife often marking the lowest point before increasing again into older age.

  • 1:16:41

    Subjective Age Predicts Longevitydata

    After age 40, most people feel about 20 percent younger than their chronological age, and this subjective feeling serves as a better predictor of lifespan than biological age.

Quotes

  • “Good learning happens through making mistakes.”
    Unnamed speaker · 0:00
  • “The best way to remember something is to, again, failures.”
    Unnamed speaker · 0:17
  • “I almost memorized the entire periodic table.”
    Unnamed speaker · 4:19
  • “If you make people draw it while they're looking at it, they're going to remember it better.”
    Unnamed speaker · 9:01
  • “The more you see something, the better you'll remember it, just like the Apple logo.”
    Unnamed speaker · 34:33
  • “On hot days. And when you look at these investigations, the reason this happens is, you know, these are very responsible, very intelligent parents, who will, you know, put their child in the car, and then get in the car, and then you just get in this mode of, I'm going to work, I'm going to do my job.”
    Unnamed speaker · 44:51
  • “The walking group, the group that was randomly assigned to walk three, four times a week for 40 minutes, compared to a stretching group who's still engaging in exercise, but not cardiovascular exercise, the walking group, their hippocampus actually increased in volume by 1%.”
    Unnamed speaker · 52:34
  • “I think the more you think about it, it's amazing how much we do remember, especially under some circumstances. But I agree that a lot of this, you know, scuba diving too, because you're underwater with, you know, buoyancy, you have to figure things out.”
    Unnamed speaker · 47:32
  • “I bike two miles uphill to work and then two miles downhill. It's probably, sometimes it's the best time of my day.”
    Unnamed speaker · 1:27:49
  • Wealthfront 10:50–11:59
  • Helix Sleep 12:17–13:36
  • AG1 40:27–41:46
  • Lingo 1:36:31–1:37:40
  • Huberman Lab 2:26:07–2:26:28
  • Protocols: An Operating Manual for the Human Body 2:27:03–2:27:42
  • Neural Network newsletter 2:27:51–2:28:18
  • Kroger 2:28:39–2:29:04

About this episode

Dr. Alan Castel, PhD, is a professor of psychology at the University of California, Los Angeles (UCLA) and one of the world's foremost experts on human memory and cognitive aging. We discuss what science actually tells us about how to improve our learning ability and memory at any age. We also discuss how memory works, why all planning and imagination about the future is based on the past, false memories, and how to leverage curiosity, emotion, and self-testing retrieval practice to stamp in memories for the long term. We discuss what "superagers"—people who actually improve their cognitive capacity with age—do differently than everyone else. This episode is for anyone interested in the science of memory and tools to maintain and improve your memory across the lifespan. Thank you to our sponsors AG1: https://drinkag1.com/huberman Wealthfront*: https://wealthfront.com/huberman Helix Sleep: https://helixsleep.com/huberman Function: https://functionhealth.com/huberman Lingo: https://hellolingo.com/huberman Timestamps (00:00:00) Dr. Alan Castel (00:02:41) What Is Memory?, Reconstruction & Metacognition (00:04:49) Mnemonics, Remembering Names & Deeper Learning (00:08:22) The Penny & Apple Logo, Noticing vs Seeing, Learning Through Mistakes (00:10:43) Sponsors: Wealthfront & Helix (00:14:05) Neuroplasticity, Frustration, Curiosity & Mindset (00:17:42) Maintaining vs Learning New Things, Habits, Novelty & Emotional Memory (00:24:28) "Mental Photographs," Photo-Taking & Imagining the Future (00:29:28) Eyewitness Memory, the Ronald Cotton Case, Confidence vs Accuracy (00:35:07) Medium-Term & Prospective Memory, Hotel Fire Exits (00:40:28) Sponsor: AG1 (00:41:47) When Habits Turn Lethal, Aviation & Human Error (00:49:01) Why Memory Changes With Age; Alzheimer's & the Nun Study (00:52:34) Exercise & Hippocampal Volume, Falls & Balance (00:57:14) SuperAgers & Athletes; Regret, Balance & Being Driven (01:12:08) Sponsor: Function (01:13:45) Age Stereotypes, Subjective Age & Positive Age Beliefs (01:20:02) Goals & Plans, Scams; Anterior Midcingulate Cortex & SuperAgers (01:26:23) Culture, Resilience, Blue Zones & COVID (01:29:18) Adversity, the Positivity Effect & Intergenerational Learning (01:36:31) Sponsor: Lingo (01:38:00) Limitations & Purpose; Time, Family & Connection (01:44:58) Deliberately Building Memories; the ABCs of Successful Aging (01:51:02) Following Your Interests; Castel's Path & Older Adults (01:57:16) Mental Simulations, Curiosity Studies & Selectivity (02:01:19) Socioemotional Selectivity Theory; Steve Jobs & Lifespan (02:07:10) The Secret to Successful Aging; State vs Trait Curiosity (02:11:04) Scams & AI Voice Cloning (02:14:31) John Wooden, Wisdom, Love & Balance (02:17:41) Learning Through Mistakes; Does the Brain Get Better With Age? (02:25:00) Conclusion, Better With Age (02:26:00) Zero-Cost Support, YouTube, Spotify & Apple Follow, Reviews & Feedback, Sponsors, Protocols Book, Social Media, Neural Network Newsletter Disclaimer & Disclosures *This experience may not be representative of other Wealthfront clients, and there is no guarantee of future performance or success. Experiences will vary. Andrew Huberman receives cash compensation from Wealthfront Brokerage for paid testimonials in his podcast, creating a conflict of interest. The Cash Account, which is not a deposit account, is offered by Wealthfront Brokerage LLC, member FINRA/SIPC. Wealthfront Brokerage is not a bank. The base APY is 3.30% on cash deposits as of January 30, 2026, is representative, subject to change, and requires no minimum. If eligible for the overall boosted rate of 4.05% offered in connection with this promo, your boosted rate is also subject to change if the base rate decreases during the 3 month promo period. Additional terms and conditions apply, which can be found on Wealthfront.com/Huberman. Funds in the Cash Account are swept to program banks, where it earns the variable APY. Same-day withdrawal or instant payment transfers may be limited by destination institutions, daily transaction caps, and by participating entities such as Wells Fargo, the RTP® Network, and FedNow® Service. New Cash Account deposits are subject to a 2-4 day holding period before becoming available for transfer. Investment advisory services are provided by Wealthfront Advisers LLC, an SEC-registered investment adviser. Securities investments: not bank deposits, bank-guaranteed or FDIC-insured, and may lose value. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

0:00
2:28:54

30,858 words · 3 speakers

Speaker names marked are inferred from speaking time and the show’s known hosts — they are not voice-verified.

Topics

  • The Art of Spending Money
  • UCLA
  • Stanford
  • Apple logo
  • New York City
  • Better With Age
  • California
  • MRI
  • CT scans
  • nattokinase

Page updated · transcript and summary are machine-generated