Audit a URL →

Sign in Sign up free

Loading…

Weekly · Sunday Morning

Five longevity claims.
Worth your time.
Every Sunday.

Last Sunday

Rapamycin extends mouse lifespan 9–14%
NAD+ precursors reverse aging in humans
Blue-light glasses improve sleep quality
Walking 10 min after meals blunts glucose
Verdict change — caffeine half-life downgraded

5 audits·1 verdict change·0 affiliate links·Every Sunday

Joining 1,247 readers — founders, MDs, and longevity-obsessed people who fact-check their own health decisions.

Browse

Decisions Claims Content Creators

Product

Audit a URL Sunday roundup API (soon)Pricing

About

FAQ Methodology Editorial Standards Corrections Press & brand RSS feed

Legal

Terms of Service Privacy Policy DMCA

Finally, something serious in this space.
Because we actually read the papers.

© 2026 Whalespan. Independent, evidence-graded longevity.

How to Defeat Jet Lag, Shift Work & Sleeplessness — Whalespan

Content›Video›How to Defeat Jet Lag, Shift…

How to Defeat Jet Lag, Shift Work & Sleeplessness

Andrew Huberman1h 51m · 2021-01-25

Claims Made

196

Claims Supported

164

Support Rate

84%

Support rate

164 of 196 claims supported

164 supported32 partial / not

Claims from this content

163

✓Well SupportedThorne supplements are considered highly stringent regarding ingredient precision and quality.✓Well SupportedAg One (formerly Athletic Greens) is a vitamin, mineral, and probiotic drink that provides foundational nutritional needs.✓Well SupportedSunlight exposure should ideally occur within the first two hours of waking, or from a 10,000 lux light source if natural sunlight is not available.✓Well SupportedViewing sunlight around sunset can adjust the eyes' sensitivity to artificial lights later at night without disrupting the circadian clock.Well Supported

More from Andrew Huberman

Andrew Huberman on Creatine

Huberman X thread: creatine and aging

Andrew Huberman on Morning Sunlight

Discussion

Native comments, Twitter mentions, and Reddit threads about this content — surfaced together so the conversation isn't fragmented across platforms.

M

Share your read of this content…

Posting publicly as you · linked to your social profiles

Sort by:

AV

A. Volkovreader

4h

Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

NP

N. Park

2d

Would love a "what would change this verdict" RSS feed. Sign me up if it exists.

✓

Viewing bright light in the 2-3 hours after the temperature minimum will advance the circadian clock, shifting wake-up and sleep times earlier.

✓Well SupportedTaking Magnesium Threonate (145mg), Magnesium Bisglycinate (200mg), Apigenin (50mg), or Theanine (100-400mg) 3-4 nights per week, 30-60 minutes before bed, may aid sleep.

✓Well SupportedA drop in body temperature approximately two hours before natural wake-up time is a physiological marker that can be shifted.

✓Well SupportedNon-sleep deep rest (NSDR) protocols, including meditation, yoga nidra, and hypnosis, can support better brain and body function by inducing a state of deeper relaxation.

✕Not SupportedSupplements targeting the serotonergic system for sleep can lead to fragmented sleep and difficulty in later sleep phases.

✓Well SupportedA 10-20 minute NSDR protocol can help people with sleep onset challenges by teaching self-directed relaxation.

✓Well SupportedIncreasing body temperature via cold exposure or exercise after 8:00 PM can delay the circadian clock.

✓Well SupportedFlexibility in sleep schedules is beneficial for adolescents and teens due to their naturally later circadian rhythms.

✓Well SupportedGetting bright light exposure in the morning and throughout the day is recommended for improving sleep, energy, mood, and regulating appetite.

✓Well SupportedLight exposure is the most effective method for shifting one's circadian clock, but significant shifts may require combining light with other factors.

✓Well SupportedUsing light, temperature, and exercise around the body's temperature minimum effectively shifts circadian clocks.

✓Well SupportedVitamin D3 is important for immune system function, metabolic function, and other biological pathways.

✓Well SupportedThorne brand supplements have high accuracy and stringency in listing their compounds.

✓Well SupportedMelatonin supplements in the US are often inaccurately labeled, with some containing none of the stated ingredient or significantly different amounts.

✓Well SupportedTheanine can be used during the daytime at dosages of 200-400mg to offset the jitteriness associated with caffeine.

◐Partially SupportedThe supplement industry has variable quality, and product contents may not match the label.

✓Well SupportedDuring shift work, use as much light as safely possible when alertness is required and darkness for sleep.

✓Well SupportedExamine.com is a valuable resource for information on specific compounds, their effects, and human studies.

✕Not SupportedTheanine at 100 milligrams can cause disruptive or anxiety-ridden vivid dreams for some individuals.

✕Not SupportedBright light exposure after 8:00 PM, and especially between 10-11 PM and 4:00 AM, can reset and shift the circadian clock, disrupting sleep.

✓Well SupportedMagnesium threonate may have neuroprotective properties, though human clinical studies are ongoing.

✓Well SupportedGoing outside, even on a cloudy day, provides significantly more photon energy than typical indoor lighting, aiding circadian clock setting.

✓Well SupportedApigenin, a chamomile derivative, acts as a hypnotic by activating chloride channels and increasing GABA in the brain, inducing sleepiness.

✓Well SupportedEating according to the local schedule is one of the fastest ways to shift one's circadian clock.

✓Well SupportedLifestyle choices can influence the rate of aging and disease likelihood.

✓Well SupportedMelatonin inhibits gonadotropin-releasing hormone, luteinizing hormone, and hormone production, and is the hormone of darkness.

✓Well SupportedThe human autonomic nervous system is better at activating and staying alert than shutting down to sleep on demand.

✓Well SupportedIndoor artificial light sources are insufficient to set the circadian clock effectively before the circadian dead zone.

✓Well SupportedAdjusting to a nine-hour time difference involves determining one's temperature minimum and adjusting their schedule two to three days prior to travel with bright light exposure, exercise, or meals.

✓Well SupportedIn the middle of the day, the body enters a 'circadian dead zone' where light cannot shift the circadian clock or provide a wake-up signal.

✓Well SupportedUltradian rhythms, shorter than circadian rhythms, influence daily attention and focus.

✓Well SupportedExposing teens to light before they wake up increases total sleep time, helps them fall asleep earlier, and provides approximately 45 minutes more deep sleep.

✓Well SupportedThe suprachiasmatic nucleus synchronizes circadian rhythms with the light-dark cycle, and tissue clock cells synchronize with the master clock.

✓Well SupportedNegotiating to stay on the same shift for two weeks at a time can benefit shift workers and mitigate negative health effects.

✓Well SupportedWaking up at the end of a 90-minute ultradian cycle may improve the transition from sleep.

✓Well SupportedIntense afternoon exercise can increase body temperature and delay the circadian clock, leading to later sleep and wake times.

✓Well SupportedPeriods of rapid development, such as infancy and puberty, are also periods of accelerated biological aging.

✓Well SupportedBright artificial lights of any color can activate wakefulness mechanisms.

✓Well SupportedEarly day light exposure is valuable for wakefulness.

✓Well SupportedFor trips of three days or less, individuals should attempt to stay on their home sleep schedule.

✓Well SupportedOlder individuals tend to experience less sleep, have reduced melatonin production, and sleep in more irregular time periods due to aging.

✓Well SupportedGetting sunlight exposure within 15-30 minutes of waking or using a 10,000 lux light source helps set the circadian rhythm and boost mood.

◐Partially SupportedLight exposure should be timed based on internal body temperature rhythms: avoid light when temperature is decreasing and seek light when temperature is increasing.

◐Partially SupportedEating, viewing sunlight, and exercising in the four to six hours after one's temperature minimum will advance their circadian clock.

◐Partially SupportedMelatonin is a hormone naturally released in the evening that promotes sleepiness and facilitates falling asleep.

◐Partially SupportedViewing sunlight or artificial light between 6:00 PM and 8:00 PM can help delay the circadian clock and enable staying up later when traveling west.

◐Partially SupportedNeurons in the eye that set the circadian clock respond best to specific qualities and amounts of light present during natural daylight.

✓Well SupportedJet lag occurs because rapid travel disrupts the body's natural circadian rhythm driven by the sun's light-dark cycle.

◐Partially SupportedUnderstanding the mechanism behind a practice provides flexibility to adapt when the ideal behavior cannot be performed.

✕Not SupportedMagnesium citrate is poorly absorbed and primarily acts as a laxative.

✕Not SupportedPrescription sleeping pills can be habit-forming and have significant side effects.

◐Partially SupportedTemperature is a key effector for the central circadian clock, impacting all cells and tissues and manipulating wake-up time and metabolism.

✓Well SupportedNon-excessive amounts of caffeine and coffee or tea can help individuals stay awake until local bedtime when traveling westward.

◐Partially SupportedBehavioral protocols like NSDR can teach the brain and nervous system to turn off thoughts and go to sleep without medication.

◐Partially SupportedThere is no established consequence or recovery mechanism for 'sleep debt' akin to financial debt.

◐Partially SupportedICU psychosis can develop in patients lacking sunlight exposure and proper circadian rhythm cues.

◐Partially SupportedTraveling westward is generally easier than traveling eastward due to the effects of jet lag on longevity.

◐Partially SupportedAs children age, their melatonin cycles become more regular, and their body temperature rhythms shift towards ultradian rhythms (approximately 90-minute cycles).

◐Partially SupportedThere is a theoretical concern that if magnesium L-threonate preferentially enters the brain, less magnesium may be available for DNA repair and other organs.

◐Partially SupportedMelatonin is not cyclic in babies; it is released at a constant, phasic level, resulting in high concentrations per unit volume due to their smaller size.

◐Partially SupportedProbiotics are important for the gut-brain axis, immunity, metabolic health, and endocrine health.

◐Partially SupportedMelatonin release patterns are high and stable in children, become cyclical during puberty, and become more disrupted with age.

◐Partially SupportedMelatonin operates on a concentration-dependent level, where high concentrations can inhibit GnRH, LH, testosterone, or estrogen, particularly in children.

✓Well SupportedExercising immediately upon arrival at the hotel helps align the circadian rhythm with local time and is followed by a usual breakfast.

◐Partially SupportedUnderstanding biological mechanisms provides flexibility to adapt interventions when exact protocols cannot be followed.

◐Partially SupportedHigh levels of melatonin can cause ovaries and testes to shrink in seasonally breeding animals, leading to infertility.

◐Partially SupportedBehavioral interventions like light exposure, exercise, and temperature manipulation offer greater safety margins and do not have endocrine side effects compared to melatonin for sleep.

◐Partially SupportedThe temperature minimum is the most effective anchor point for shifting the body's internal clock.

◐Partially SupportedThe body's temperature minimum, occurring approximately 90 minutes to two hours before average waking time, is a critical biological marker.

◐Partially SupportedNewborn babies have very poor visual acuity for the first 6-8 months.

◐Partially SupportedCold exposure can trigger a rebound increase in melatonin, potentially explaining deep sleep after a late-night ice bath.

◐Partially SupportedL-theanine can promote more restful sleep when taken 30-60 minutes before bedtime.

◐Partially SupportedThe body's thermostat lowers its set point as bedtime approaches, causing a feeling of coolness.

◐Partially SupportedTwo days of waking with the sun and avoiding light at night can reset melatonin and cortisol rhythms.

◐Partially SupportedParents mapping to a baby's schedule should maintain their autonomic nervous system in a state that avoids heightened alertness during intended sleep periods.

◐Partially SupportedBehavioral protocols such as NSDR, natural light viewing, exercise, hot baths, and cold showers should be prioritized before considering supplements for sleep.

◐Partially SupportedMagnesium malate is suggested as a beneficial form of magnesium supplementation because malate can serve as an energy source for gut epithelial cells and mitochondria.

✕Not SupportedExcessive focus on optimizing sleep can lead to sleep anxiety and a negative feedback loop where worrying about not sleeping causes more difficulty sleeping.

✕Not SupportedNapping for 20 minutes to an hour and then waking up four hours later, or waking up at midnight and being unable to fall back asleep, is detrimental to sleep patterns.

◐Partially SupportedElderly individuals benefit from maximizing natural light exposure and minimizing artificial light exposure, especially during the night.

✓Well SupportedAllowing children to sleep as late as they naturally want is critical, provided they maintain a consistent sleep schedule.

◐Partially SupportedExposure to natural light can alleviate psychotic symptoms in ICU patients, suggesting a role for circadian rhythm regulation.

◐Partially SupportedHuman beings are diurnal, designed to be awake during the day and asleep at night.

◐Partially SupportedThere is significant individual variability in how people experience and manage jet lag.

◐Partially SupportedDeviating significantly from a diurnal schedule and attempting to be nocturnal can lead to serious mental and physical health effects.

✕Not SupportedViewing sunlight upon arrival in a new time zone may not effectively shift the circadian clock if it falls within the circadian dead zone or the four to six hours before the temperature minimum.

◐Partially SupportedStress and aging can cause hair to turn gray or white due to increased nerve fibers releasing adrenaline to the hair follicle.

✕Not SupportedShift work, particularly the swing shift, is detrimental to health parameters, disrupts cortisol release, impairs learning, and disrupts the dopamine system and well-being.

?Limited ResearchHigh melatonin levels in animals may inhibit reproductive hormones, but this effect is not necessarily replicated in humans taking supplemental melatonin or disrupting puberty in children.

◐Partially SupportedCircadian rhythms, including metabolism, immune system, and mood, are tethered to the external light-dark cycle.

◐Partially SupportedRecovering from severe sleep disruption after travel can be aided by consistently exercising at the same time daily, making the home dark at night, and maximizing bright light exposure during the day without sunglasses.

◐Partially SupportedPolyphasic sleep, such as 45-minute increments, can reduce total sleep needed but is difficult to maintain.

◐Partially SupportedManaging jet lag, especially when traveling eastward, requires tracking and adjusting based on the shifted temperature minimum.

◐Partially SupportedTaking unspecified red mineral pills may allow for remarkable sleep restoration with only four hours of sleep.

◐Partially SupportedSetting a baby's environment to a 24-hour schedule, with colder periods for sleep and warmer periods for wakefulness, helps regulate their sleep.

◐Partially SupportedDeep rest states, even without sleep, can lead to neurochemical resets like dopamine level changes.

◐Partially SupportedExcessive daytime sleepiness, unless occurring around the temperature peak for about 90 minutes, may indicate insomnia or lack of sleep.

◐Partially SupportedSunlight is the preferred stimulus for circadian clock setting because it is free and possesses special qualities not replicated by artificial lights.

◐Partially SupportedThe pineal gland produces minuscule amounts of DMT, insufficient to cause hallucinations associated with sleep, dreaming, or other DMT-induced states.

◐Partially SupportedThe human brain and circadian timing mechanisms were not designed to shift by more than a couple of hours, making large time zone shifts detrimental.

◐Partially SupportedSetting the circadian clock via light exposure is crucial for both mental and physical health and does not involve vitamin D production in the skin.

◐Partially SupportedDifficulty in falling asleep earlier, particularly when traveling east, may have evolutionary roots.

◐Partially SupportedLooking at a computer or phone screen (500-1,000 lux) for less than 100 minutes will not register a morning signal with the circadian clock.

◐Partially SupportedSome supplements can improve sleep quality, facilitate sleep onset, and potentially enable shorter sleep durations.

◐Partially SupportedNon-prescription supplements with high safety margins may be beneficial for sleep and can be explored by consulting scientific literature.

◐Partially SupportedMagnesium increases sleep depth and decreases the time it takes to fall asleep.

◐Partially SupportedNon-sleep deep rest protocols can help parents maintain autonomic regulation and recover even with interrupted sleep.

◐Partially SupportedA 2006 study examined differences in lifespan related to frequent eastward, westward, and no travel, as well as other biological markers of longevity.

◐Partially SupportedThe body's internal circadian rhythm is approximately 24 hours, influencing body temperature cycles.

◐Partially SupportedNight shift workers should avoid bright light before sleep and consider wearing sunglasses when viewing the sun at the end of their shift to prevent phase delays.

◐Partially SupportedA wristband that measures circadian body temperature and identifies the temperature minimum would be a valuable tool for managing jet lag and circadian shifts.

◐Partially SupportedShifting circadian clocks using light, temperature, exercise, and food is crucial for adapting to new time zones.

◐Partially SupportedJet lag can be exacerbated by age and genetics, and there is no single pharmacological solution to eliminate it.

◐Partially SupportedJet lag has been shown to shorten lifespan and lead to earlier death.

◐Partially SupportedJet lag can occur without travel due to irregular sleep schedules, late-night screen use, or inconsistent exercise timing.

◐Partially SupportedConsistent timing of exercise and meals helps reinforce and stabilize the body's circadian clock.

◐Partially SupportedMelanopsin converts light into electrical signals to set the circadian clock.

◐Partially SupportedSunlight exposure during midday, especially when the sun is overhead, is ineffective for shifting the circadian clock.

◐Partially SupportedSeasonal breeding animals change coat color based on light and melatonin levels.

◐Partially SupportedLight, melanin, and dopamine are involved in reproduction, while lack of light and melatonin are associated with reduced reproduction in animals.

◐Partially SupportedMelatonin may be a beneficial option for elderly individuals experiencing difficulties with falling asleep and staying asleep, and this should be discussed with a physician.

◐Partially SupportedAcupuncture may stimulate anti-inflammatory compounds and affect inflammation levels depending on the specific acupuncture sites used.

◐Partially SupportedThe average wake-up time from the last three to five wake-up times can approximate the time of the temperature minimum.

◐Partially SupportedWearing eye covers (night shades) can be useful on planes and in hotels to block light and aid in maintaining a home sleep schedule.

◐Partially SupportedArtificial light exposure at night disrupts biological pathways related to melanin, skin cell turnover, and dopamine.

◐Partially SupportedLight exposure through eyelids can influence circadian timing and sleep duration, particularly in teens.

◐Partially SupportedA 24-hour trip does not significantly disrupt the body clock if the home schedule is maintained.

◐Partially SupportedSignificant jet lag can lead to vertigo, mood fluctuations, and disorientation.

◐Partially SupportedTraveling north or south without significant time zone shifts causes travel fatigue but not time zone jet lag.

◐Partially SupportedParents adapting to a baby's 90-minute sleep cycles may need to adjust their own rest periods accordingly.

◐Partially SupportedSleeping in on Sunday is not advisable for non-shift workers to avoid disrupting their schedule.

◐Partially SupportedMorning and evening sunlight exposure are crucial for anchoring the circadian clock when sleep is highly disrupted or chaotic.

◐Partially SupportedMeditation via apps like Headspace can improve cognition and mental and physical recovery.

◐Partially SupportedTheanine activates GABA pathways, reducing top-down thinking and facilitating sleep onset.

◐Partially SupportedMeditation practices that involve lack of focus and attention to internal states can help with sleep.

◐Partially SupportedNewborn babies have more sensitive eye optics and a natural aversion to bright light due to underdeveloped visual systems and poor light adjustment capabilities.

◐Partially SupportedPositive feelings associated with light exposure on the skin are hard-wired biological mechanisms.

✕Not SupportedAndrew Huberman avoids L-Tyrosine supplementation due to the risk of a significant crash the following day.

✕Not SupportedBright light should be avoided for infants and young children as a sleep aid.

✕Not SupportedThe pineal gland does not calcify with age and its function is not affected by calcification.

✕Not SupportedLight, exercise, and meal timing around the temperature minimum are more effective for shifting the circadian clock than melatonin or binaural beats.

◐Partially SupportedEvening light exposure adjusts retinal sensitivity, creating a buffer against circadian disruption from artificial lights late at night.

◐Partially SupportedFor individuals working night shifts, viewing the setting sun in the evening acts as a morning light cue that promotes wakefulness for their shift.

◐Partially SupportedCaution is advised with magnesium supplementation due to its role in heart rhythm.

◐Partially SupportedBabies have a natural aversion to bright lights due to underdeveloped light-adjusting mechanisms in their eyes.

◐Partially SupportedJet lag can cause temporary amnesia.

◐Partially SupportedThe pineal gland produces melatonin throughout a person's life.

◐Partially SupportedMelatonin helps induce sleepiness for falling asleep in a new location but does not help with staying asleep.

✕Not SupportedViewing bright light before sleep for night shift workers can phase delay their circadian clock, making sleep harder.

◐Partially SupportedJet lag symptoms tend to worsen with age.

◐Partially SupportedTemperature is the primary signal that entrains the body's cells and tissues to a unified schedule.

◐Partially SupportedThe circadian rhythm is an internal 24-hour cycle that regulates functions like wakefulness and sleepiness.

◐Partially SupportedSome species can change sex depending on day length or the density of males and females.

◐Partially SupportedUnderstanding one's temperature minimum and maximum in a 24-hour cycle can provide a sense of control over biology and psychology.

◐Partially SupportedBlue blockers should not be worn when alertness is desired, and light brightness is the key factor in preventing circadian shifts.

◐Partially SupportedShift workers need to be aware of their internal temperature rhythm due to misaligned circadian cycles.

◐Partially SupportedApigenin has intra-estrogenic effects and may reduce the conversion of androgens to estrogens, which could be a concern for individuals aiming to maintain estrogen levels.

◐Partially SupportedTaking a hot shower in the morning can phase delay the body's clock by delaying the normal increase in body temperature.

◐Partially SupportedArtificial lights, particularly overhead lights, can activate the circadian clock.