Devon Blog

Tag: sleep

  • Top credible sleep research findings boiled down to plain language

    Here is a concise list of top credible sleep research findings boiled down to plain language, with references to the original studies or reviews:

    1. Recommended Sleep Duration for Health

    • Research: Consensus Statement by the American Academy of Sleep Medicine (AASM)pmc.ncbi.nlm.nih
    • Plain Speak: Most adults need at least 7 hours of quality sleep nightly. Children and teens need more—up to 12-16 hours for infants, 9-12 hours for school-age kids, and 8-10 hours for teens—to support growth, learning, mood, and metabolism. Sleeping too little or too much regularly can increase risks of diseases and cognitive problems.

    2. Morning Light Exposure Anchors the Circadian Rhythm

    • Research: Chronobiology studies on light’s effect on circadian clocksmed.stanford+1
    • Plain Speak: Getting sunlight early in the morning resets your internal clock, helping you feel awake during the day and sleepy at night. It triggers hormones that wake you up and stops sleep hormones, so your body knows when to sleep next.

    3. Consistent Sleep Schedule Improves Sleep Quality

    • Research: Sleep timing and circadian rhythm research, including Huberman’s synthesishubermanlab+2
    • Plain Speak: Going to bed and waking up around the same time every day — even on weekends — helps keep your body clock regular, making it easier to fall asleep and wake up refreshed.

    4. Limiting Evening Blue Light Protects Melatonin

    • Research: Studies on light wavelength effects on melatonin productionmitohealth+2
    • Plain Speak: Blue light from phones, tablets, and LED lights tricks your brain into thinking it’s daytime, lowering sleep hormone production. Avoid screens or use blue light blockers before bed to fall asleep faster.

    5. Cool Sleep Environment Boosts Deep Sleep

    • Research: Thermal regulation studies impacting sleep stageshubermanlab+1
    • Plain Speak: Your body cools down to help you fall asleep deeply. Keeping your bedroom cool — around 65°F (18°C) — helps you sleep better and feel more rested.

    6. Exercise and Diet Timing Influence Sleep

    • Research: Clinical trials on exercise timing and sleep, dietary carbohydrate effectslongevity.stanford
    • Plain Speak: Regular exercise improves sleep, but avoid intense workouts right before bed. Eating a balanced, carbohydrate-focused dinner can help sleep-friendly chemicals in your brain work better.

    7. Caffeine and Alcohol Impact Sleep

    • Research: Clinical effects of stimulants and depressants on sleepsleeptracker+2
    • Plain Speak: Avoid caffeine after midday because it keeps you awake. Alcohol may help you fall asleep but reduces sleep quality by disrupting important sleep cycles.

    8. Pre-Sleep Relaxation Techniques and Supplements

    • Research: Neuroscience of anxiety reduction and clinical trials on supplements like magnesium and L-theanineyoutubeupworthy+1
    • Plain Speak: Moving your eyes slowly side to side and deep breathing calms your brain to help you fall asleep. Natural supplements like magnesium and L-theanine can promote relaxation and better sleep if used properly.

    9. Sleep Study and Diagnosis Advancements

    • Research: American Academy of Sleep Medicine clinical guidelines on sleep studiesaasm+2
    • Plain Speak: For persistent sleep problems, sleep studies measure brain waves, oxygen, and body movements to diagnose disorders like sleep apnea. Accurate diagnosis helps guide effective treatment.

    References to Original Research

    • Paruthi S, et al. Consensus statement for recommended sleep durations by age groups. J Clin Sleep Med. 2016;12(11):1549–1561pmc.ncbi.nlm.nih
    • Huberman A. Neuroscience of sleep and circadian rhythm. Huberman Lab. 2025hubermanlab
    • Chronobiology and light exposure studies. Stanford Universitymed.stanford
    • American Academy of Sleep Medicine clinical practice guidelines. J Clin Sleep Med. 2018aasm
    • Magnesium, L-theanine supplementation clinical trials. Huberman Lab, various studieshonehealthyoutube
    • Effects of caffeine and alcohol on sleep. NHLBI, AASMsleeptracker+1
    • Sleep environment and thermoregulation research. Sleep Medicine Reviewshubermanlab

    1. https://pmc.ncbi.nlm.nih.gov/articles/PMC5078711/
    2. https://med.stanford.edu/news/insights/2020/06/setting-your-biological-clock-reducing-stress-while-sheltering-in-place.html
    3. https://www.hubermanlab.com/newsletter/improve-your-sleep
    4. https://mitohealth.com/blog/sleep-hacking-hubermans-high-performance-rest-rituals
    5. https://www.hubermanlab.com/episode/sleep-toolkit-tools-for-optimizing-sleep-and-sleep-wake-timing
    6. https://www.hubermanlab.com/topics/sleep-hygiene
    7. https://longevity.stanford.edu/research-update-on-sleep/
    8. https://sleeptracker.com
    9. https://med.stanford.edu/news/insights/2022/10/ask-me-anything-neuroscience-with-andrew-huberman.html
    10. https://www.youtube.com/watch?v=Se151brgGSM
    11. https://www.upworthy.com/neuroscientist-andrew-huberman-shares-really-weird-trick-to-fall-asleep-in-five-minutes
    12. https://honehealth.com/edge/andrew-huberman-sleep-cocktail/
    13. https://aasm.org/read-10-viewed-sleep-research-papers-published-jcsm-2018/
    14. https://pmc.ncbi.nlm.nih.gov/articles/PMC4246141/
    15. https://pmc.ncbi.nlm.nih.gov/articles/PMC9760081/
    16. https://aasm.org/sleep-research-in-the-journal-of-clinical-sleep-medicine-top-studies-of-2023/
    17. https://academic.oup.com/sleep
    18. https://www.sciencedirect.com/journal/sleep-medicine-reviews
    19. https://www.thoracic.org/professionals/clinical-resources/sleep/sleep-modules/resources/interpreting-sleep-studies-primer.pdf
    20. https://pmc.ncbi.nlm.nih.gov/articles/PMC6281147/
    21. https://pmc.ncbi.nlm.nih.gov/articles/PMC4434546/
    22. https://www.nhlbi.nih.gov/health/sleep-disorder-treatments
    23. https://sleepresearchsociety.org/publications/journal-sleep/
    24. https://www.mayoclinic.org/tests-procedures/polysomnography/about/pac-20394877
    25. https://www.aafp.org/pubs/afp/issues/2022/0400/p397.html
    26. https://www.sciencedirect.com/science/article/abs/pii/S138994572500173X
    27. https://medicine.yale.edu/news-article/poor-sleep-may-increase-markers-of-poor-brain-health-new-study-finds/
    28. https://my.clevelandclinic.org/health/diagnostics/12131-sleep-study-polysomnography
    29. https://www.sleepfoundation.org/stages-of-sleep

  • The Importance of Sleep and Science-Backed Hacks to Optimize It

    Sleep is a fundamental pillar of health and well-being, deeply influencing physical repair, metabolic function, cognition, and emotional regulation. Yet, modern lifestyles often challenge natural sleep patterns, leading to widespread sleep deficits and their associated health costs. Fortunately, neuroscience and circadian biology research provide actionable insights into how to optimize sleep naturally. This article explores the importance of sleep and analyzes a set of prominent sleep hacks backed by science, helping individuals align their habits with biology for better rest and repair.

    Why Sleep Matters

    Sleep is not merely rest; it is an active and complex physiological process crucial for survival. Sleep allows the brain to consolidate memories, regulate emotions, clear toxins via the glymphatic system, and regulate hormone cycles that govern metabolism and tissue repair. Poor or insufficient sleep is linked to increased risks of cardiovascular disease, obesity, diabetes, cognitive decline, and mood disorders.

    Understanding the science of sleep enables us to harness its power by optimizing behavioral and environmental factors. Below, we discuss several neuroscience and biology-based sleep hacks with their scientific underpinnings.

    1. Morning Sunlight Exposure: Setting the Circadian Clock

    The Hack

    Exposing the eyes to natural sunlight within 30 to 60 minutes of waking.

    Scientific Basis

    Daylight exposure in the morning stimulates specialized retinal cells that signal the brain’s master clock in the suprachiasmatic nucleus (SCN). This exposure promotes cortisol release for alertness and suppresses melatonin production, effectively anchoring the circadian rhythm. The circadian rhythm orchestrates daily cycles of sleepiness and wakefulness, hormone release, and body temperature regulation. Regular morning light exposure, as researched by chronobiologists like Dr. Satchin Panda and supported by Huberman’s recommendations, leads to improved sleep timing and quality by reinforcing this internal clock.hubermanlab+1

    2. Consistent Sleep and Wake Times: Stabilizing Biological Rhythms

    The Hack

    Maintaining consistent bedtimes and wake times within an hour’s variance daily.

    Scientific Basis

    Regularity in sleep timings fosters synchronization of peripheral clocks throughout the body with the SCN master clock, improving sleep architecture and hormonal rhythms. Random sleep times disrupt these cycles, leading to fragmented sleep and diminished sleep quality. Multiple studies corroborate that fixed sleep schedules promote more restorative sleep and better daytime performance.mitohealth+2

    3. Evening Light Management: Protecting Melatonin Production

    The Hack

    Avoiding bright blue light 2-3 hours before bedtime or using blue light-blocking glasses.

    Scientific Basis

    Blue light (~480 nm wavelength), primarily emitted by screens and LED lighting, inhibits the pineal gland’s melatonin synthesis—the hormone essential for sleep initiation. Reduced melatonin leads to delayed sleep onset and shallower sleep. Extensive research confirms that limiting blue light exposure or filtering it in the evening restores natural melatonin rhythms and improves sleep latency and quality.hubermanlab+2

    4. Cooler Bedroom Temperature: Facilitating Sleep Depth

    The Hack

    Setting room temperature around 65°F (18°C) or slightly cooler for sleep.

    Scientific Basis

    During sleep onset, the body naturally lowers core temperature by 1-3°C to signal readiness for sleep. Cooler ambient temperatures support this thermoregulatory process, enhancing non-REM and REM sleep phases critical for restoration and cognitive processing. Experimental data demonstrate improved sleep efficiency and depth in cooler environments.mitohealth+1

    5. Eye Movement and Breathing Techniques: Calming the Mind

    The Hack

    Slowly moving eyes side-to-side behind closed eyelids combined with long exhales before sleep.

    Scientific Basis

    Neuroscientific studies show that lateral eye movements reduce activity in the amygdala, the brain’s anxiety center, shifting the brain towards a calmer state conducive to sleep. This technique leverages inherent neural circuitry to reduce stress and ease the transition into sleep. Huberman highlights this hack based on functional neural imaging and amygdala modulation research.upworthy+1

    6. Selective Supplementation to Support Sleep

    The Hack

    Taking magnesium, L-theanine, and apigenin 30-60 minutes before bedtime.

    Scientific Basis

    • Magnesium supports neuronal function by modulating NMDA receptors and increasing GABA, promoting relaxation.
    • L-theanine, an amino acid found in tea, increases alpha brain waves and enhances GABA and serotonin, reducing stress and improving sleep onset.
    • Apigenin, a flavonoid, enhances GABAergic activity supporting calmness.

    Clinical trials validate their sleep-promoting effects though individual responses vary. Huberman advises cautious, stepwise introduction and dosage adjustments to maximize benefits.youtubehonehealth+1

    7. Timing of Caffeine and Alcohol Intake

    The Hack

    Avoid caffeine within 8-10 hours of bedtime; limit or avoid alcohol before sleep.

    Scientific Basis

    Caffeine blocks adenosine receptors that signal for sleep pressure, delaying sleep onset and reducing overall sleep quality. Alcohol initially sedates but fragments sleep and suppresses REM phases essential for brain repair. Both substances interfere with natural sleep architecture, as repeatedly demonstrated in sleep research.med.stanford+1

    8. Pre-Sleep Body Temperature Regulation

    The Hack

    Taking a warm bath or shower 1-2 hours before bed.

    Scientific Basis

    Warm water increases peripheral blood flow and body temperature temporarily. The subsequent rapid cooling triggers physiological signals mimicking natural pre-sleep temperature drop, promoting sleepiness. Thermal studies confirm improved sleep latency and satisfaction with this simple intervention.hubermanlab+1

    Conclusion

    Optimizing sleep revolves around respecting and reinforcing the body’s innate circadian biology and neurophysiological processes. The hacks above are well-grounded in scientific evidence and serve as practical tools to improve sleep quality, facilitate repair, and enhance cognitive performance. Implementing such strategies can transform health through improved rest — the foundation of physical and mental vitality.

    If desired, this article can be expanded with detailed references and practical guidelines on implementing each hack. Would you like a more in-depth scientific reference section or practical tips added?

    1. https://www.hubermanlab.com/newsletter/improve-your-sleep
    2. https://med.stanford.edu/news/insights/2020/06/setting-your-biological-clock-reducing-stress-while-sheltering-in-place.html
    3. https://mitohealth.com/blog/sleep-hacking-hubermans-high-performance-rest-rituals
    4. https://www.hubermanlab.com/episode/sleep-toolkit-tools-for-optimizing-sleep-and-sleep-wake-timing
    5. https://www.hubermanlab.com/topics/sleep-hygiene
    6. https://www.upworthy.com/neuroscientist-andrew-huberman-shares-really-weird-trick-to-fall-asleep-in-five-minutes
    7. https://www.hubermanlab.com/newsletter/toolkit-for-sleep
    8. https://www.youtube.com/watch?v=Se151brgGSM
    9. https://honehealth.com/edge/andrew-huberman-sleep-cocktail/
    10. https://www.brentwoodphysio.ca/dr-huberman-recommendations-for-sleep/
    11. https://med.stanford.edu/news/insights/2022/10/ask-me-anything-neuroscience-with-andrew-huberman.html

  • The CentoViva Project: What is it?

    I’ve always been a curious person at heart. I’m a techie, always tinkering, always curious. I’ve always carried a deep sense of curiosity about ‘good health’. With a family history full of cardiovascular disease, diabetes, and other chronic conditions, I’ve always felt the need to be watchful. I don’t just want to add years to my life, I want those years to be full of – strength, movement clarity – essentially full of life.

    Like most of us today, I don’t get enough sunlight. I know exercise and movement are the foundation of staying young, but I also began to wonder: what else can I do to give my body the best chance at repairing itself, thriving, and deferring the effects of aging?

    That curiosity sparked endless questions:

    • What’s the right level of Vitamin B12, and why does it matter for energy and brain health?
    • How much Vitamin D3 do I really need, and what does the science say about its role in immunity, mood, and longevity?
    • Which supplements are truly backed by research, and which ones are just hype? I’m all about sticking with the basics
    • How do I know if a supplement is safe to take, even if it doesn’t help, can I be sure it won’t do me harm?
    • And beyond supplements: how can I improve sleep, support cellular repair, and align my lifestyle with the latest science?

    I realized that what I was really searching for was clarity. Not vague advice. Not marketing promises. Not the next fad diet, fad supplement or superfood. But structured, science-backed answers I could trust, explained simply, and applied safely to everyday life.

    That’s what the CentoViva Project is about.

    CentoViva is a living guide to the big questions we all have about health: why a certain nutrient matters, how it works in the body, how much is optimal, and what the research really says about safety and effectiveness. It’s not about chasing miracles. It’s about building confidence, knowing that every choice you make is informed, supported by science, and aligned with your goal of living not just longer, but stronger.

    This is where my personal journey meets yours. Welcome to CentoViva – a 100 years of LIFE. A quest for answers to “Living longer, stronger”

    Disclaimer Notice:

    The information and opinions shared on CentoViva are for general informational purposes only. We are not medical professionals, and nothing you read or see here should be considered medical advice, diagnosis, or treatment.

    While we strive to share accurate and up-to-date information based on scientific research that we read or discover, any use of this content is strictly at your own risk.

    Before making any changes to your health routine or starting new supplements, it is essential to do your own research and consult with a qualified healthcare provider who understands your personal medical history and needs. Never disregard or delay seeking professional medical advice because of something you read on this site.

    By visiting our platform, using CentoViva’s content, you acknowledge and agree that we are not responsible for any health outcomes that may result from your decisions. Your health is your responsibility, please handle it cautiously and thoughtfully.

  • Cancer risks can be reduced with a better lifestyle

    A cancer smart lifestyle includes avoiding tobacco, eating a healthy diet, maintaining a healthy weight, and limiting alcohol consumption. Other cancer smart lifestyle habits include:

    • Exercising regularly
    • Getting good sleep
    • Reducing stress
    • Limiting refined sugars and fat from animal sources
    • Limiting time in front of the TV and computer
    • Getting regular checkups
    • Avoiding unnecessary exposure to radiation

    According to researchers, up to 90% of cancer cases are caused by lifestyle and environmental factors. The top risk factors linked to lifestyle are:

    • Cigarette smoking
    • Excess body weight
    • Alcohol intake

    Alcohol increases the risk of various types of cancer, including cancer of the breast, colon, lung, kidney, and liver.