The Gravity Doctors

Lachlan Kent
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  • MEDICINE
  • UPDATED SEMIWEEKLY

Dr Brennan Spiegel and Dr Lachlan Kent introduce you to the world of Biogravitational Medicine, how gravity shapes our bodies and minds for better or worse. Explore the principles of gravity management, how you can improve your gravity resilience, and what to do when gravity fails you and your body. Dr Spiegel is a trained M.D., professor of public health at Cedars-Sinai hospital in LA, and author of the book 'Pull - How gravity shapes your body, steadies the mind, and guides our health'. Dr Kent is a cognitive scientist with a PhD in the psychology of 'mental gravity'.

  1. APR 23

    Artemis: Transcending gravity as human flourishing

    In this episode, Dr. Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr. Lachlan Kent(cognitive scientist and founder of Mental Gravity) explore the physical, psychological, and existential implications of humanity's return to the moon. They examine how the Artemis mission acts as a "Global Unifier," shifting the narrative from territorial conflict to a collective human achievement. Broadcasting as a "crew of two," they reflect on the transition from the stoic, emotionally restrained era of Apollo to the joyful, diverse, and deeply "human" experience of modern space exploration. They connect the physics of "untethering"from Earth to the metaphysics of "mental gravity," arguing that space travel is the ultimate expression of humanity's anti-gravity mission. One Giant Leap for Humanity: The ArtemisPerspective A Global Unifier: A 21st-century mission that transcends national borders, bringing the world together to witness one of humanity's greatest achievements.The Physics of Fragility: An exploration of the "immense forces" required to fight gravity and the vulnerability of the human body in zero-G environments.The Overview Effect: The profound psychological realization that occurs when astronauts look back at the planet and see it not as a collection of countries, but as a single "crew" on Spaceship Earth.Humanizing Space: A shift from the "stoic" pilots of the 1960s to a mission characterized by visible joy, big hugs, and diverseleadership. Space Travel as a Biogravitational Mission Breaking the Tether: Humanity’s evolutionary history is defined by standing up and using intelligence to build machines that allow us to fly and eventually "blast off" from the planet.The Two Portals: Space travel forces a confrontation with two realities: the "awe-inspiring" view of home and the "existential dread" of the black void.Inner Space vs. Outer Space: The lessons learned from reaching the moon are applied to "inner space," helping individuals navigate the gravitational pull of their own minds. Timecodes 00:04 — Introduction to the Artemis mission and its global significance.00:30 — Exploring the social and spiritual implications of overcoming gravity.01:38 — Artemis as a "Global Unifier"transcending national borders.02:14 — The physics of untethering and the fragility of the human body.02:43 — Reflections on looking back at "SpaceshipEarth".04:24 — Humanizing space: Comparing modern joy and diversity to Apollo-era stoicism.05:56 — The nuance of falling and fighting gravity as alife force.07:34 — Standing up as humanity's existential mission.08:41 — The anti-gravity mission: Breaking the tether to bring consciousness beyond Earth.10:11 — Space travel as a driver for new scientific and experiential understanding.12:37 — Pioneering, science, and the phenomenology of the unknown.14:56 — Mental Gravity: Elevation and perspective vs.the "stuckness" of depression.16:11 — The Astronaut's Perspective: De-centering tofind meaning and universal connection.18:43 — The Two Portals: Navigating the "OverviewEffect" (awe) and the black void (dread).22:16 — The spiritual dimension of gravity and the physical induction of awe.22:39 — Oceanic consciousness, ego dissolution, and the transient self.25:26 — Choosing a portal: Naturalistic spirituality and the news of a "cosmic whole".27:00 — The evolution of the "crew":Interconnection as a strategy for mutual survival.28:42 — Selflessness vs. Selfishness: Finding hopeful signs of social cohesion.32:00 — Convergence: Biogravitational medicine as a holistic approach to humanity's future.34:56 — Closing: Inviting others into the"crew" and future launch of Mental Gravity.Resources The Gravity Doctors: https://thegravitydoctors.com Dr. Brennan Spiegel: https://brennanspiegelmd.com Dr. Lachlan Kent: https://lachlankent.au Book — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    36 min

  2. MAR 2

    Kurt Cobain and the Gravity of Child Development with Dr Mats Niklasson

    Dr Lachlan Kent is joined by Dr Mats Niklasson, developmental psychologist, visiting Research Fellow at the University of Greater Manchester, and co-founder of Sensorimotor Therapy, to explore how early vestibular development shapes both physical coordination and the narrative sense of self. Drawing on nearly 40 years of clinical work with children and adults experiencing coordination and concentration difficulties, Mats explains how early reflexes—especially the Moro (startle/falling) reflex—connect infants to gravity. When these developmental processes are disrupted, the result may be delayed motor patterns, emotional dysregulation, learning challenges, and even later-life identity instability. Using the life of Kurt Cobain as a psychobiographical case study, the conversation explores how gravitational insecurity may influence creativity, mental health, and the lifelong struggle to feel “at home” in one’s own body. Check out Mat's book on the topic: "The discovery of international autoethnographical psychobiography" https://bookstore.emerald.com/the-discovery-of-international-digital-collaborative-autoethnographical-psychobiography-hb-9781837083817.html 1. Sensorimotor Therapy & Gravity A developmental approach grounded in movement and balance Focuses on vestibular activation and early motor patterns Links physiology and psychology through embodied development Works by re-engaging early fetal-style movements The goal:Reconnect the nervous system with gravity to release arrested development Primary Reflexes & Early Development All infants are born with survival reflexes The Moro reflex is closely tied to the vestibular system If not properly integrated: Crawling patterns may be skippedWalking and speech may be delayedConcentration and coordination may sufferVestibular development sits on a continuum—not simply “normal” vs “impaired” Reconnecting to Gravity Therapy works by: Recreating early fetal movement patternsEngaging attachment between child and caregiverStimulating vestibular systemsObserved outcomes include: Return of expected motor patternsImproved regulationReduction in headaches and stomach achesThis suggests a deep link between vestibular development and whole-body wellbeing From Body to Biography Mats connects early vestibular insecurity to later psychological outcomes: Development is trajectory-based Small early deviations may compound over time Identity itself may emerge from embodied stability. Kurt Cobain as Case Study Niklasson’s analysis suggests: Possible early developmental difficulties Verified diagnoses included scoliosis and chronic bronchitis Chronic stomach pain remained unexplained He may have suffered from IBS—undiagnosed in his lifetime Vestibular instability may have influenced: SensitivityWithdrawalCreativitySearch for equilibriumNiklasson proposes Cobain may have been “a victim of his time,” lacking modern frameworks to understand syndrome-like conditions Creativity & Instability Drawing on Coleridge’s distinction between: Fancy imagination (common) Secondary imagination (rare, generative) Some creative individuals may channel instability into talent. Therapeutic balance is key: Stability may reduce suffering But may also alter creative expression Resources The Gravity Doctors: https://thegravitydoctors.com Dr Brennan Spiegel: https://brennanspiegelmd.com Dr Lachlan Kent: https://lachlankent.au

    1h 10m

  3. FEB 14

    All loved "UP" on Valentines Day: Gravity and cuffing season

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore how seasons, sunlight, serotonin, and gravity shape mood, attraction, and human connection. Broadcasting from opposite hemispheres—Brennan in winter in Los Angeles and Lachlan in summer in Melbourne—they examine why people often feel more “down” in winter, why this is linked to reduced sunlight and serotonin, and how this helps explain the phenomenon known as “cuffing season”—the seasonal urge to pair up. They connect dating, love, posture, breath, yoga, serotonin, oxytocin, and even planetary orbits into a single biogravitational story: human connection is shaped by the same gravitational cycles that shape the seasons themselves. Seasons as Gravitational Cycles Seasons arise from Earth’s orbit around the sunNot just temperature cycles, but gravitational and light cycles Mood follows seasonal gravity: Summer = outward, expansive, light Winter = inward, heavy, contractingBreath mirrors this cycle: in/up, out/down Winter, Serotonin, and Mental Gravity Sunlight boosts serotoninLow winter sunlight → lower serotonin → heavier moodSeasonal Affective Disorder (SAD) as a gravity-related mood stateSerotonin as a “gravity management molecule” that supports: Muscle toneCirculationUpright postureMental elevationLove, Attraction, and Gravity “Falling in love” uses gravitational language Uprightness—physical, emotional, moral—is attractiveWinter dating favors depth over displaySpring favors peacocking; winter favors bondingLong-term connection as gravitational alignment of values Winter Practices for Gravity Resilience Movement & PostureYoga as a winter-friendly anti-gravity practiceInversions, posture, alignment, balanceLow-intensity movement over intense training Light &EnvironmentMaximize sunlight exposureUse light boxes in high-latitude wintersGet outside when possible Diet & ChemistryTryptophan-rich foods: turkey, avocado, chicken, chickpeas, kidney, beans, eggs, tofu, nutsSupport serotonin production through diet ConnectionCuddling, closeness, bondingOxytocin releaseOxytocin → vagus nerve → serotoninParasympathetic “rest and digest” state Neurochemistry of Winter Bonding Oxytocin primes vagus nerveVagus nerve regulates serotonin releaseCuddling + calm = anti-gravity physiologyParasympathetic tone matches seasonal slowing Biogravitational Medicine in Daily Life Human health reflects planetary physicsSun, moon, Earth, and orbit shape biologyMood, love, and seasons are not mystical—just naturalGravity as the hidden organizer of emotion, posture, and connection Timecodes 00:00 — Welcome & hemispheres01:15 — Seasons and gravity02:15 — What is cuffing season?03:15 — Mood, winter, and seasonal affect04:40 — Sunlight, serotonin, and heaviness06:05 — Planetary cycles and breath cycles07:15 — Love as anti-gravity08:15 — Depth vs display in dating09:20 — Uprightness and attraction10:45 — Winter activities and posture11:35 — Yoga and winter gravity13:15 — Balance, breath, and alignment15:40 — Light therapy and sunlight16:40 — Diet and serotonin foods16:55 — Cuddling, oxytocin, vagus nerve18:15 — Parasympathetic winter mode19:05 — Biogravitation and planetary life20:35 — Falling in love & falling physically21:00 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    22 min

  4. FEB 6

    How the Brain Senses Gravity — with Elisa Ferrè

    Dr Lachlan Kent and Dr Brennan Spiegel are joined by Elisa R. Ferrè, professor of cognitive neuroscience at Birkbeck, University of London, and one of the world’s leading experts on graviception and the vestibular system. Together, they explore how the brain senses gravity without a single “gravity receptor,” why the vestibular system has no primary cortex, and how gravity is computed as a distributed, multisensory model integrating vestibular, visual, proprioceptive, and visceral signals. The conversation spans neuroscience, emotion, aesthetics, culture, spaceflight, and mental health—revealing gravity as the hidden scaffolding of perception, meaning, and wellbeing. 1. What Is Graviception? The brain’s ability to sense and model gravityNot driven by a single receptor or cortical areaConstructed through multisensory integrationFundamental to embodiment, orientation, and survival Why the Vestibular System Is Unique No unimodal “vestibular cortex”Projects broadly across the brainDoes not produce a clear conscious sensationBecomes noticeable mainly when something goes wrong (dizziness, vertigo, nausea) The vestibular system acts as the glue binding mind and body, anchoring us in a single embodied perspective. How the Brain Computes Gravity Gravity is not perceived directlyThe brain integrates: Vestibular otolith signals (head tilt, linearacceleration)Visual cues (verticality, alignment)Proprioception (joints, muscles, posture)Visceral signals (internal organs)Each signal is weighted by reliability to form an internal model of terrestrial gravity. Gravity, Meaning, and Culture Preferences for verticality (upright lines, tall buildings)Vertical = power, stability, positivityDownward tilt = unease, disorderGravity shapes art, architecture, language, and metaphor Up = good, free, elevatedDown = heavy, negative, constrained Emotion, Fear, and the Vestibular System Vestibular pathways connect directly to: AmygdalaInsulaHypothalamusThis explains why vestibular disturbances are emotionally chargedDizziness and vertigo trigger fear, nausea, and autonomic responsesGravity sensing is deeply tied to survival systems Weightlessness and Freedom Parabolic flight (“vomit comet”) as a unique graviceptive stateWeightlessness described as profound freedomAlso physiologically challengingPost-flight “down” feelings mirror return to gravity Freedom comes with a cost: sensory conflict and adaptation demands. Space Adaptation & Neuroplasticity Astronauts experience space motion sicknessSymptoms: nausea, disorientation, brain fogThe brain can adapt through neuroplasticityAdaptation takes time, energy, and training Implicationsfor long-term space travel and Mars exploration. Gravity, Mental Health, and Everyday Life Anxiety as mis-tuned gravity anticipationDepression as altered temporal and bodily groundingMental fitness as trainable gravity resilience Tools discussed: Yoga and postureBreath awarenessGrounding through the feetWeighted blanketsMusic, rest, and multisensory regulationPractical Graviceptive Tip Stand still and feel the pressure through the soles of your feetNotice the security of 1GUse grounding as a way to reduce anxiety and reset expectations Timecodes 00:00 — Introduction & guest welcome02:00 — What makes the vestibular system unique05:00 — Why gravity is mostly unconscious06:30 — How the brain computes gravity09:30 — Homunculus vs gravity computation11:30 — Gravity as a prior for perception14:00 — Semantics, aesthetics & verticality17:00 — Architecture, art & meaning20:00 — Vestibular system & emotion22:00 — Parabolic flight & weightlessness24:00 — Freedom, addiction & the cost of zero-G28:30 — Space adaptation syndrome31:00 — Can humans adapt to Mars?35:30 — Everyday graviception & grounding38:00 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.au

    39 min

  5. JAN 27

    EMERGENCY EPISODE: Alex honnold’s incredible gravity-defying climb

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) drop an emergency episode to unpack one of the most extreme acts of gravity defiance ever witnessed: Alex Honnold climbing a 100-plus-storey skyscraper without ropes. Using Honnold as an “extreme phenotype,” they explore what his remarkable calm reveals about fear, anxiety, graviception, and mental gravity. Drawing on neuroscience, psychology, and lived experience, they examine how Honnold’s quiet amygdala, finely tuned salience network, and relentless present-momentfocus allow him to operate where most humans would be paralysed by fear. The episode bridges elite performance and everyday mental health, asking: what can the rest of us learn—safely—from someone who literally does not fear falling? 1. Why Alex Honnold Matters A real-world example of ultimate gravity resilienceFree-solo climbing as the most literal test of mental gravityAnxiety, fear of falling, and bodily panic stripped awayA window into the far edge of human psychological capacity Fear, Falling, and the Brain AmygdalaHonnold’s amygdala shows minimal activation to fear-inducing stimuliContrast with anxiety, chronic pain, IBS, and fibromyalgia, where the amygdala is hyper-vigilant Salience Network & Anterior InsulaDetects what matters in the body and environmentSimulates graviceptive cues without triggering panicAnchors awareness in the present moment Being in the Moment—Taken Seriously Honnold’s survival depends on microsecond-level presenceNo anticipatory anxiety, no future projectionFinger placement, balance, and movement solved in real timePresence as an adaptive skill—not a slogan Gravity Sensitivity as a Continuum Humans vary widely in tolerance for heights, G-forces, and riskToo much fear → paralysisToo little fear → dangerHealthy functioning lies in the middle of the curve Mental Gravity, Anxiety, and Depression Anxiety = anticipation of fallingDepression = being stuck or weighed down in the presentHonnold represents the opposite extreme: calm within gravityInsights help reframe everyday anxiety as mis-tuned gravity perception Training vs Talent Honnold combines rare inborn traits with years of intense trainingPhysical: extreme strength, precision, enduranceMental: emotional regulation, present-moment focusFear is not absent—it is managed and contained What Can We Learn (Safely)? Not to climb skyscrapers—but to train mental fitness: Cognitive Behavioural Therapy as mentaltrainingMeditation as present-moment conditioningBreathwork, yoga, and grounding practicesSocial connection and rest as recoveryBalancing effort and recovery (noovertraining)Mental fitness = something you work on, not something you either have or don’t have. One Percent Rule You don’t need to be Alex HonnoldChanneling 1% of his presence, calm, and training can meaningfully improve everyday resilience Timecodes 00:00 — Emergency episode & skyscraper climb01:10 — Free Solo and gravity defiance02:15 — Watching the footage & bodily reactions02:45 — Fear, falling & butterflies03:30 — Amygdala findings04:20 — Anxiety, pain & hyper-vigilance05:10 — Salience network & graviception06:20 — Courage vs fearlessness06:50 — Gravity sensitivity across populations07:50 — Mental gravity & anxiety08:50 — Training, not recklessness10:00 — Being truly in the moment11:10 — Depression, anxiety & time orientation12:05 — Learning from extreme phenotypes13:20 — Mental health in a steeper world14:20 — Training for modern life15:20 — Mental fitness beyond CBT16:10 — Meditation, breath & balance17:35 — One percent of Honnold18:30 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    19 min

  6. JAN 15

    Defying Gravity: The Olympics and the Limits of Human Performance - Ep 9

    How do elite athletes use body, mind, joy, and meaning to push beyond physical limits? Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore theOlympics as humanity’s greatest laboratory for defying gravity. With the Winter Olympics approaching, they examine elite athletes as “physics-fighting engines”—bodies and minds trained to resist, redirect, and sometimes seemingly escape gravity. Through stories of Cathy Freeman, Quincy Hall, Alex Honnold, and modern superstars like Steph Curry and Luka Dončić, they show how peak performance is not just physical—it is mental gravity management. They introduce Olympic training as a real-world expression of biogravitational medicine, where strength, balance, imagery, joy, poise, team culture, and meaning all shape how far humans can push their relationship with gravity. 1. Why the Olympics Matter to Mental Gravity The Olympics showcase humanity at the edge of physical limits Elite sport = everyday gravity management taken to extremes Athletes model what it means to fight gravity physically and mentally Peak performance = synchronization of body, brain, and meaning Athletes as Anti-Gravity Prototypes Cathy Freeman (Sydney 2000) “Floating” to gold in the 400m Home crowd as acceleration, not pressure Up, light, fast = opposite of depression Quincy Hall (Paris 400m Final) Turning failure into flight Last-minute mental reversal → physical transcendence Basketball, Ski Jumping, SkatingLeaping, flying, spinning, managing G-forcesAngular momentum and rotational control as gravity mastery Mental Gravity in Elite Performance Performance depends on mental poise, not just muscle Stillness before action Pressure as fuel, not burden Crowds as acceleration, not oppression Joy as a performance amplifier Examples: Steph Curry — joy + precision Luka Dončić — playfulness under pressure Ash Barty — recovery from “the yips” through joy Imagery, Rehearsal, and Gravity Mental imagery as bodily rehearsal Kyrie Irving visualizing free throws Alex Honnold mentally climbing El Capitan before climbing it Mental gravity = using body as template for thought and emotion Up = energized Down = heavy Calm = balanced Fear, Falling, and Mastery Fear of falling = gravitational anxiety Elite athletes train to feel secure within gravity Butterflies in the belly = falling sensations Great athletes use fear to prime—not paralyze—the nervous system Timecodes 00:00 — Welcome & why the Olympics matter 01:00 — Peak athleticism as defying gravity 02:00 — Cathy Freeman & floating to gold 03:30 — Winter sports & G-forces 04:30 — Quincy Hall’s last-minute flight 06:00 — Mental vs physical performance 07:30 — Stillness, pressure & acceleration 09:00 — Joy as a performance tool 10:30 — The yips, anxiety & recovery 12:00 — Mental imagery in sport 13:30 — Kyrie Irving & visualization 14:45 — Alex Honnold & fear mastery 16:15 — Fear, falling & butterflies 17:45 — Biogravitational training stacks 19:00 — Team culture & social gravity 20:30 — VR, the Proteus Effect & training 22:00 — Dead hangs & gravity endurance 24:00 — Olympics as humanity’s gravity experiment 25:00 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.com Dr Brennan Spiegel: https://brennanspiegelmd.com Dr Lachlan Kent: https://lachlankent.au Book — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    21 min

  7. 12/20/2025

    Serotonin: The Body’s Anti-Gravity Molecule - Ep 8

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore serotonin as a gravity-management molecule, reframing it not simply as a “happiness chemical,” but as a fundamental biological system that allows life to stand up, move fluids, regulate balance, and remain psychologically buoyant in a gravitational field. Together, Brennan and Lachlan unpack new research on serotonin’s role across the gut, cardiovascular system, lymphatics, vestibular system, reproduction, and mood—showing how 95% of serotonin is produced in the gut, in symbiosis with the microbiome. They trace serotonin’s evolutionary origins from ocean life to land, altitude, and even space, and discuss practical implications for diet, exercise, sunlight, microbiome care, and mental health. 1. What Is Serotonin? A whole-body gravity resilience molecule, not just a brainneurotransmitter Exists in two largely separate compartments: brain and gutCentral to movement, circulation, balance, mood, and vitalityEvolutionarily conserved across plants, animals, and humans Serotonin as a Gravity-Management System Gut & DigestionMotility against gravity in any body orientation Pumps & TubesBlood pressure regulation, cardiac contractility, lymphatic return Balance& OrientationVestibular function; dizziness during SSRI withdrawal ReproductionRetrograde uterine contractions that move sperm upward against gravity Mood &EnergyMental elevation, vitality, resilience, and time perception The Microbiome–Serotonin Alliance Trillionsof microbes are required to trigger serotonin productionThe gut as a “dark, sulfurous, hydrothermal” evolutionary nicheA symbiotic bargain: microbes get mobility; humans get serotoninChanges in altitude, microgravity, and spaceflight rapidly alter serotoninbiology STACK TEN: The Anti-Gravity Diet (introduced) A practical framework from Pull for supporting serotonin production via tryptophan-rich foods. Core principles:Tryptophan as substrateMicrobiome diversityDietary balance rather than supplementation alone Therapeutic & Self-Care Implications Dietary modification (tryptophan-rich foods, microbiome-supportive diets)Exercise and movementSunlight and time outdoorsWorking with dietitians for GI and mood conditions (e.g., low-FODMAP when indicated)Understanding limits and side effects of SSRIsNaturally supporting serotonin across body and mind Metaphor & Meaning The gutmicrobiome as the “spice factory” of human biologySerotonin as the true “spice of life”—powerful, regulating, and double-edgedGravity as the organizing principle linking biology, psychology, and medicine Timecodes 00:00 —Welcome & why serotonin matters01:10 — Serotonin beyond the “happiness chemical”02:20 — Gut vs brain serotonin compartments03:20 — Pumps, tubes & whole-body effects04:25 — Lymphatics, reproduction & balance06:20 — Evolutionary origins & gravitation08:10 — Microbiome symbiosis metaphor10:15 — Altitude, spaceflight & serotonin disruption11:30 — STACK TEN diet introduced12:45 — Diet, microbiome & mood disorders13:50 — Dune, spice & serotonin metaphor15:45 — SSRIs: benefits, limits & side effects17:00 — Natural serotonin support & integration17:45 — Closing reflections & next steps Resources The Gravity Doctors website: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    18 min

  8. 12/08/2025

    Brennan's antigravity diet - Boost your serotonin with STACK TEN Ep 7

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore how diet, microbiome diversity, and serotonin production shape your capacity to stand up to gravity—physically and mentally. They introduce the Anti-Gravity Diet and Brennan’s STACK TEN framework, a simple, evidence-informed way to support the gut’s serotonin “factories” and improve whole-body gravity resilience. Along the way, they unpack how food, fibre, omega-3s, polyphenols, vagus-nerve activation, and mindful rest all participate in the body–mind system that keeps us upright and energised. Together, Brennan and Lachlan discuss babies as “gravity novices,” leaky gut, the gut–brain axis, evolutionary embodiment, time dilation in depression, and why serotonin—serum tone—is essential for managing the constant downward pull of Earth’s gravity. A holistic framework for supporting natural serotonin production—the body’s anti-gravity molecule.Grounded in gastrointestinal physiology, microbiome science, and biogravitational medicine. Not a restrictive diet — a practical, everyday toolkit for gravity resilience.A memory device for foods that supply the raw material (tryptophan) for serotonin production: SalmonTurkeyAvocadoChickpeasKidney beansTofu/TempehEggsNuts Paired with: Fibre → feeds microbes that create short-chain fatty acids Omega-3s → shift the microbiome toward serotonin-supporting species Polyphenols → found in berries, cocoa, turmeric, and green tea 00:00 — Welcome & overview of the Anti-Gravity Diet01:20 — Serotonin as the body’s anti-gravity molecule04:20 — Microbiome diversity & the gut barrier06:30 — Babies, serotonin & early gravity resilience09:40 — Tryptophan, fibre & short-chain fatty acids11:00 — Leaky gut, inflammation & decoherence13:00 — Food–mood science & depression16:40 — What to eat: introducing STACK TEN17:00 — The ten tryptophan-rich foods18:50 — Polyphenols, omega-3s & microbiome tuning19:50 — Beyond diet: exercise, nature, sunlight21:20 — Balancing sympathetic vs parasympathetic tone23:00 — Vagus-nerve stimulation & rest-and-digest24:30 — Gravity as the integrator across biological levels26:00 — Life as a system for managing gravity27:20 — Closing reflections & future topics The Gravity Doctors website: ⁠https://thegravitydoctors.com⁠Gravitype Quiz: virtualmedicine.org/pullDr Brennan Spiegel: brennanspiegelmd.comDr Lachlan Kent: lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    28 min
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Ratings & Reviews

5
out of 5
5 Ratings

About

Dr Brennan Spiegel and Dr Lachlan Kent introduce you to the world of Biogravitational Medicine, how gravity shapes our bodies and minds for better or worse. Explore the principles of gravity management, how you can improve your gravity resilience, and what to do when gravity fails you and your body. Dr Spiegel is a trained M.D., professor of public health at Cedars-Sinai hospital in LA, and author of the book 'Pull - How gravity shapes your body, steadies the mind, and guides our health'. Dr Kent is a cognitive scientist with a PhD in the psychology of 'mental gravity'.

Information

  • Creator
    Lachlan Kent
  • Years Active
    2025 - 2026
  • Episodes
    14
  • Rating
    Clean
  • Copyright
    © Lachlan Kent
  • Show Website
    The Gravity Doctors

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