Huberman LabAMA #16: Sleep, Vertigo, TBI, OCD, Tips for Travelers, Gut-Brain Axis & More
CHAPTERS
- 0:00 – 3:30
Intro, Australia Tour, and Premium Support for Human Research
Huberman opens from Sydney, thanks premium subscribers, and explains how premium revenue—now with 3:1 matching donors in 2024—is funding human-based research in areas like mental health, migraine, immunology, cancer, mindset, nutrition, and exercise physiology.
- •Recording live AMA from Sydney during an Australian tour (Melbourne, Sydney, Brisbane).
- •Premium subscriptions already funded labs at Stanford, Columbia, Salk and others for human clinical research.
- •New dollar-for-dollar match donors in 2024 will significantly expand funded human studies.
- •Focus areas: mental health interventions, headache/migraine, immune–cancer interactions, mindset and immunity, nutrition, and exercise physiology.
- 3:30 – 13:00
Staying On Pillars While Traveling: Light, Red Light, Movement, NSDR
He addresses how he maintains core health behaviors while on tour, emphasizing protocols that integrate with real life rather than rigid routines. He details using sunlight, red light at night, morning movement, social engagement, caffeine, and NSDR/Yoga Nidra to keep circadian rhythms and stress in check.
- •Protocols are meant to be low-cost and life-compatible, not ascetic or joyless.
- •Morning sunlight exposure—even on overcast days—is a cornerstone for circadian alignment.
- •He travels with a simple red light bulb to dramatically dim evening light and lower cortisol, easing sleep.
- •Morning ‘quadfecta’ for rhythm: sunlight, movement, social interaction, caffeine or breakfast (he skips breakfast).
- •NSDR/Yoga Nidra used daily to manage stress and replenish dopamine and vigor, with new 10/20/30-minute NSDR videos recorded in Sydney.
- •Plans for NSDR/meditation content on YouTube Clips and possibly a Spotify album.
- 13:00 – 26:10
Is 5–6 Hours of Sleep Enough? QQRT, Trackers, and NSDR Backfill
Huberman unpacks how to evaluate whether shorter sleep is sufficient, introducing Matt Walker’s QQRT framework: quality, quantity, regularity, and timing. He cautions against over-reliance on sleep trackers and recommends NSDR as a way to compensate for modest sleep duration and improve sleep depth.
- •Insomnia = excessive daytime sleepiness due to insufficient nighttime sleep, not just short sleep duration.
- •Some individuals feel fine on 5–6 hours, especially if naps (10–30 minutes) are available.
- •QQRT: Quality (continuity and slow-wave/REM balance), Quantity, Regularity (consistent schedules), and Timing (aligned with chronotype).
- •Timing matters: early types do better with earlier bedtimes even if duration is the same, and vice versa for night owls.
- •Sleep trackers can bias performance via expectation; he recommends checking subjective state before the score.
- •Morning or daytime NSDR (10–30 minutes) upon waking or later can restore ‘lost’ sleep and train better sleep depth.
- 26:10 – 38:30
Understanding and Fixing Vertigo: Inner Ear, VOR, and Visual Anchoring
He distinguishes vertigo from lightheadedness and explains the vestibulo-ocular reflex using the inner ear’s semicircular canals and otoliths. He then provides a practical drill that uses visual fixation to recalibrate the system, useful for vertigo and motion sickness.
- •Differentiate: lightheadedness feels like falling straight down; vertigo is spinning and falling.
- •Vertigo often implicates inner ear and/or visual system, not just hormones or hydration.
- •Semicircular canals with otoliths detect pitch, yaw, and roll; their signals integrate with eye movements to stabilize vision.
- •The vestibulo-ocular reflex (VOR) stabilizes imagery via rapid, tiny eye movements.
- •Disruption (boats, small enclosed vehicles, successive closed spaces) can cause motion sickness and vertigo.
- •Tool: fixate on a distant point or fingertip and slowly move it toward the nose, then back; repeat to let visual input dominate and retrain the VOR.
- •Looking at distant horizons and getting outside can also reduce vestibular mismatch and nausea.
- 38:30 – 52:10
Repairing Brain Function After Poor Habits and TBI
Responding to concerns about damage from poor sleep, diet, and early-life TBI, Huberman emphasizes the brain’s robustness and capacity for recovery. He outlines sleep-based glymphatic clearance, feet-elevated sleep, hyperbaric oxygen, and creatine as promising tools, while warning against overzealous anti-inflammatory supplement use.
- •Advises against ruminating on past trans fats and poor habits; focus energy on present correction.
- •Biological systems can recover significantly unless severely damaged; neuroplasticity persists.
- •For TBI: prioritize excellent sleep to enhance glymphatic clearance of cellular debris and ROS.
- •Sleeping with feet elevated 5–15 degrees can increase glymphatic outflow; sleeping upright is worst for it.
- •Hyperbaric oxygen therapy (HBOT) may improve TBI outcomes when accessible.
- •Creatine monohydrate (5–10 g/day) supports forebrain energy metabolism and may aid cognition at altitude and after TBI.
- •Warns against high-dose curcumin/turmeric due to possible DHT suppression and lead contamination—use cautiously and avoid anti-inflammatory obsession.
- 52:10 – 59:30
OCD as a Circuit Disorder: Drugs Plus Targeted Behavior
He explains OCD as a miswiring in basal ganglia go/no-go circuits and their dopamine-driven reward connections. Huberman reframes SSRIs not as simple ‘serotonin boosters’ but as neuromodulatory wedges for plasticity, emphasizing that behavioral protocols must exploit that window to rewire obsessive-compulsive loops.
- •OCD involves obsessions and compulsions where performing the compulsion actually intensifies the obsession.
- •Likely rooted in maladaptive basal ganglia circuitry and its coupling to dopamine-based reward systems.
- •Effective treatment often requires neurologically informed pharmacology, including SSRIs, despite public skepticism.
- •Antidepressants work primarily by enabling neuroplasticity, not just by correcting a single neurochemical deficit.
- •Structured exposure-and-response-prevention (ERP): provoke obsession, resist or replace the compulsion with therapist support, leveraging medication-induced plasticity.
- •TMS may provide additional circuit modulation for severe OCD.
- 59:30 – 1:06:30
Mini Jet-Lag Toolkit: Shifting SF to NYC by Three Hours
Using a SF→NYC example, Huberman describes how to pre-shift circadian rhythms based on body temperature minimum and timed light exposure. He also offers a ‘brute-force’ option using local behavior and strategic napping when pre-shifting isn’t feasible.
- •Approximate rule: temperature minimum is ~2 hours before habitual wake time (e.g., 6:00 a.m. if you wake at 8:00).
- •In the 1–2 days pre-trip, get bright light between temp minimum and ~4 hours after (e.g., 6–10 a.m.), even if you then go back to sleep.
- •Avoid bright light before temp minimum to prevent backward phase shifts.
- •Pre-shifting mimics earlier local sunrises and eases adaptation upon arrival.
- •Brute-force method: upon arrival, use caffeine, morning light, exercise, and city social rhythm; expect late-morning slump and plan a 30–90-minute nap.
- •Plans to create a visual guide (chart / clip) to help people compute protocols from wake time, temp minimum, and destination.
- 1:06:30 – 1:15:30
Omega-3 Fish Oil: Dosing, Contaminants, and Mood Effects
Huberman defends fish oil’s value despite skeptical headlines, focusing on omega-3s as building blocks for brain membranes and their antidepressant effects at sufficient EPA doses. He discusses sourcing, forms, and how to interpret labels so dosing reaches therapeutic EPA levels.
- •Strong evidence supports omega-3s for brain and cardiovascular health; media ‘null’ headlines often miss dosage/details.
- •Concern is mainly contaminants like mercury; choose reputable, cleaned products.
- •He personally dislikes sardines/cod liver oil taste and prefers lemon-flavored liquids or capsules when traveling.
- •Goal is EPA content, not just ‘fish oil’ volume; antidepressant-range is ~1–3 g/day EPA.
- •He takes ~1.5–2 g EPA daily, often requiring more capsules or larger liquid servings than label ‘serving size’.
- •High-EPA formulations are also prescription drugs for mood and cardiovascular endpoints in some countries.
- •Most people consume excess omega-6 relative to omega-3; fish oil helps rebalance.
- 1:15:30 – 1:26:00
Hormone Testing: What, When, and How Often
He outlines a pragmatic schedule for hormone labs in otherwise healthy people and highlights which markers matter. Huberman emphasizes pattern and ratios (e.g., free vs total testosterone) over single numbers, and notes the importance of timing and menstrual phase in women.
- •Ideal (but uncommon) schedule: baseline in late teens, again mid-20s, at 30, then annually from 40 onward if no known endocrine issues.
- •Annual labs after 40 help monitor lipids, liver enzymes, and sex hormones, not just testosterone.
- •Key markers: IGF-1, total and free testosterone, estradiol, DHT, cortisol (morning, fasted), creatinine, LDL, ApoB, SHBG; women also prolactin and progesterone.
- •Women should, where possible, test at a consistent menstrual phase (e.g., mid-follicular or mid-luteal) for comparability.
- •Ratios and free fractions (e.g., free T) are more informative than headline total values.
- •Mentions services like InsideTracker and other clinics but stresses the concept over any specific vendor.
- 1:26:00 – 1:33:00
Post-Workout NSDR and Avoiding Overtraining
Huberman responds to a listener who needs NSDR after workouts, framing it both as a powerful recovery tool and a possible signal of overtraining. He uses this to generalize about leaving ‘gas in the tank’ for both exercise and work, prioritizing consistency and injury prevention.
- •Post-workout NSDR likely accelerates recovery and is beneficial.
- •If workouts create severe next-day or same-day exhaustion, intensity or duration may be too high.
- •Training to 80–90% effort often yields better overall energy and consistency than maximal efforts.
- •Parallels in work: identify a sustainable daily workload instead of chronic 100-hour weeks and frequent illness.
- •Most important rule in training: don’t get hurt, because injury halts progress entirely.
- •Leaving the gym or run feeling like you could do more tends to improve vigor and adherence.
- 1:33:00 – 1:40:30
Gut–Brain Axis Basics: Sleep, Fermented Foods, Fiber, and Microbial Diversity
He offers a concise protocol to support the gut–brain axis, focusing on sleep, prudent antibiotic use, fermented foods, fiber, and reasonable exposure to environmental microbes. Huberman also briefly touches on microbiome benefits of pets and criticizes fiber-free diets.
- •Foundations: adequate sleep and avoiding unnecessary antibiotics, while taking prescribed ones when needed.
- •Daily goal: 1–4 servings of low-sugar fermented foods (e.g., sauerkraut, kimchi, kefir, natto).
- •Get enough prebiotic and probiotic fiber from fruits and fibrous vegetables; strong evidence supports fiber for gut motility and reduced GI cancers.
- •Avoid chronic overuse of antiseptic mouthwashes and hand sanitizers that wipe out beneficial microbiota.
- •Exposure to natural environments and pets increases microbiome diversity; Sonnenburg even lets his kids eat without handwashing after yard play.
- •He’s pro-probiotic and pro-fiber, skeptical of all-meat/no-fiber regimens for long-term gut and systemic health.
- 1:40:30 – 1:51:30
Tongue Cleaning, Oral Microbiome, and Systemic Health
Closing with oral health, Huberman shares consensus advice from multiple dentists on brushing, flossing, mouthwashes, and tongue cleaning. He underscores oral health as a major pillar of brain and cardiovascular health, recommending gentle tongue brushing with a dedicated soft brush over aggressive scraping.
- •Dentist consensus: brush and floss, especially before bed, and avoid alcohol-based antiseptic mouthwashes.
- •Nighttime brushing is critical because saliva drops during sleep and teeth re-mineralization occurs then.
- •Tongue scraping is acceptable but often done too aggressively; better to gently brush the tongue.
- •Use a separate soft toothbrush for the tongue; optional mild salt and baking soda are acceptable and low-abrasion.
- •Replace tongue brush every few weeks to months.
- •Oral pathogens like Streptococcus mutans can enter the bloodstream, cross the blood–brain barrier, and possibly contribute to dementia.
- •Oil pulling isn’t strongly supported by evidence; dentists Huberman consulted were neutral-to-skeptical but not alarmed by it.
- 1:51:30
Wrap-Up and Lighthearted ‘Upside-Down’ Australia Sign-Off
Huberman ends with a playful remark about being ‘upside down’ in Australia and jokes about swirling his AG1 in the opposite direction below the equator. He thanks listeners again and reiterates his appreciation for their interest in science.
- •Playful comments about hemispheric reversal and camera orientation in Australia.
- •Joke about swirling AG1 counterclockwise vs clockwise.
- •Hints at future content on latitude, equator, and neural functioning (jokingly).
- •Closes by thanking premium subscribers and emphasizing gratitude for their interest in science.
