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The shorter your sleep, the shorter your life. The World Health Organization considers night shift work, where you lose sleep, a possible carcinogen. Every spring when we lose an hour of sleep, there's a 24% increase in heart attacks. Every fall, when we gain an hour of sleep, heart attacks decrease by 21%. Sleep is connected to our health in a massive way, and you need seven to eight hours of sleep. Turn your phones off hours before bed. Use blue light glasses if you have to. Get away from the screens and chill down. Maybe read before bed, but don't get stimulated.

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Poor sleep negatively impacts hormones, increasing stress and hunger hormones like cortisol and ghrelin. This can raise the risk of insulin resistance, anxiety, brain fog, and heart disease. Poor sleep also hinders physical and mental recovery. It can lead to junk food cravings, irritability, and reduced willpower, making daily tasks more difficult.

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And one of the bad things that happens is that the liver suffers. The liver is involved in all sorts of things, production of important hormones and other factors related to metabolism, and when mice can eat around the clock, their livers got very sick. Fatty deposits in the liver, other factors in the liver, essentially taking down the pathway of liver disease. The time restricted feeding essentially reversed that or led, in many cases, to even healthier liver conditions, and that's based on this study, but also additional studies also now in humans.

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If we don't get enough sleep or the quality of sleep is poor, it can affect our body and behaviors. The first and most obvious change is becoming irritable and losing our temper quickly. We also develop increased appetite for sugary and high calorie food. Lack of sleep makes us feel tired and sleepy during the day, affects our performance at work, and can lead to more errors and careless mistakes. Our judgment and decision making are also affected. Our reactions can be slower, and there is a higher chance of motor vehicle accidents. If sleep problems continue for a long time, it can affect our health in many ways. It can lead to high blood pressure, depressed mood, anger, forgetfulness, and problems with acid reflux and heartburn.

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Quality sleep is a cornerstone of good health, especially for those with kidney disease. During sleep, your body produces and releases cytokines, proteins that fight inflammation and infection. Sleep is when your body, including your kidneys, undergoes repair processes. Stress reduction. Good sleep lowers stress hormones that can burden your kidneys. Consistent schedule. Aim for seven to nine hours of sleep, going to bed and waking up at the same time daily. Create a sleep sanctuary. Keep your bedroom dark, quiet, and cool. Mind your diet. Avoid large meals, caffeine, and excess fluids close to bedtime. Relaxation techniques. Try deep breathing or gentle stretching before bed. Screen time. The blue light from devices can disrupt your sleep cycle. Remember, improving your sleep can significantly boost your immune function and support your kidney health. If sleep problems persist, consult a healthcare professional. Tap the link in our bio to contact us.

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Deep sleep burns fat because insulin levels are low, shifting the metabolism. Poor or insufficient sleep prevents this fat burning, causing fuel accumulation. Occasional sleep deprivation, like jet lag, can be recovered from, but chronic stress and alcohol consumption lead to consistently poor sleep. This results in a foggy brain, metabolic imbalance, reduced fat burning, and increased inflammation, weakening health defenses and increasing vulnerability to illness. Chronic stress leading to poor sleep makes getting sick unsurprising.

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During deep sleep, the gut repairs its lining and balances bacteria. The gut communicates with the brain via the vagus nerve to lower inflammation, improving digestion, immunity, and mood. Poor sleep disrupts this communication, causing bloating, fatigue, mood swings, and cravings. Aim for seven to nine hours of quality sleep, avoid late-night snacks, and establish a relaxing routine to improve gut health and overall well-being.

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Quality sleep is a cornerstone of good health, especially for those with kidney disease. Immune boost: during sleep, your body produces and releases cytokines, proteins that fight inflammation and infection. Kidney repair: sleep is when your body, including your kidneys, undergoes repair processes. Stress reduction. Good sleep lowers stress hormones that can burden your kidneys. Consistent schedule. Aim for seven to nine hours of sleep, going to bed and waking up at the same time daily. Create a sleep sanctuary. Keep your bedroom dark, quiet, and cool. Mind your diet. Avoid large meals, caffeine, and excess fluids close to bedtime. Relaxation techniques. Try deep breathing or gentle stretching before bed. Remember, improving your sleep can significantly boost your immune function and support your kidney health. If sleep problems persist, consult a healthcare professional. Tap the link in our bio to contact us.

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Alcohol will make you feel like you are tired and wanna go to sleep, but it doesn't really give you the quality of sleep. It actually prevents the deep sleep. And then we have caffeine. Caffeine, coffee, tea, chocolate can also act as a stimulant. That can prevent sleeping because your liver doesn't have a chance to really detoxify those stimulants. Also, the more exercise you do, the better you're gonna sleep as well.

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Alcohol affects sleep by segmenting it, leading to more frequent awakenings and suppression of REM sleep. REM sleep is crucial for emotional regulation and mood stability. People may feel they slept deeply due to waking from a deep sleep and falling asleep faster from alcohol's sedating effects, but they are actually waking up frequently. This creates a negative cycle, as the type of sleep lost is what's needed to improve well-being.

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Poor sleep, which is anything less than seven hours of uninterrupted sleep, can actually destroy your hormones and make you fat. Poor sleep can lead to elevated cortisol levels. This is because your body releases cortisol in response to stress, and sleep deprivation is a form of stress. Poor sleep can also lead to insulin resistance since sleep deprivation disrupts the body's ability to regulate blood sugar levels. It can also tank your testosterone levels too because testosterone production is regulated by your circadian rhythm. There's also a connection with getting less than seven hours of sleep and subclinical hypothyroidism, which can slow your metabolic rate. And since poor sleep can increase cortisol levels, increased cortisol production can actually inhibit progesterone production, which is not gonna be good if you're a woman. So if you're trying to lose weight, prioritize your sleep by limiting blue light at all times, going to bed early, and then by getting more sunlight.

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The shorter your sleep, the shorter your life. Insufficient sleep is linked to cancer of the bowel, cancer of the prostate, cancer of the breast. So firstly, people who are sleeping just five to six hours a night will, on average, eat somewhere between 200 to 300 extra calories each day because of their underslept state. It's a critical factor in the obesogenic epidemic. It is critical for emotional first aid and mental health. You will sleep longer, but you will only get back maybe just three or four hours of that lost total eight. That's why we get such demonstrable disease, sickness, and impairment when you undergo a lack of sleep. So this is a recent occurrence in in human beings. I mean, the the only time we see it in nature is when you go into conditions of starvation.

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During deep sleep, metabolism burns fat because insulin levels are low. Poor or insufficient sleep prevents this fat burning, causing fuel accumulation. Occasional sleep disruption is manageable, but chronic stress leads to consistently poor sleep, which is exacerbated by alcohol. This results in a foggy brain, disrupted metabolism, and reduced fat burning. Inflammation increases, weakening health defenses and increasing vulnerability to illness. Chronic stress leading to poor sleep can therefore make you sick.

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Melatonin, produced by the pineal gland, is the body's natural sleep aid. As darkness increases, melatonin levels rise, signaling the body to prepare for sleep. Blue light from digital devices can suppress melatonin production by tricking the brain into thinking it's daytime. Switching off screens an hour or two before bed may improve sleep. A good night's sleep is a cornerstone of health, so respect melatonin.

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Poor sleep isn't just about feeling tired. It's wrecking your hormones. From cortisol to ghrelin, it's raising your stress and hunger hormones throughout the day. It increases your risk of insulin resistance, anxiety, brain fog, and even heart disease. And it absolutely tanks your recovery, both physically and mentally. You crave junk, you snap more easily, and your willpower fades. If you're sleeping poorly, everything else becomes an uphill battle.

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Poor sleep, which is anything less than seven hours of uninterrupted sleep, can actually destroy your hormones and make you fat. Poor sleep can lead to elevated cortisol levels. Poor sleep can also lead to insulin resistance since sleep deprivation disrupts the body's ability to regulate blood sugar levels. It can also tank your testosterone levels too because testosterone production is regulated by your circadian rhythm. There's also a connection with getting less than seven hours of sleep and subclinical hypothyroidism, which can slow your metabolic rate. And since poor sleep can increase cortisol levels, increased cortisol production can actually inhibit progesterone production, which is not gonna be good if you're a woman. So if you're trying to lose weight, prioritize your sleep by limiting blue light at all times, going to bed early, and then by getting more sunlight.

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Balanced cortisol levels, high in the morning and low at night, along with stable blood sugar, are crucial for healthy sleep. Imbalances in cortisol disrupt the pineal gland's melatonin production, causing strong pulses in the afternoon and evening, hindering the body's ability to calm down and sleep. When cortisol remains high in the afternoon or evening, individuals may experience feeling tired but unable to sleep, or they might fall asleep from exhaustion only to wake up between 1 and 4 AM. This mid-night awakening often occurs when individuals engage in high-activity levels before bed, leaving the body in a stressed state with elevated cortisol.

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You realize you can extend your life just by fixing your sleep. If you're getting less than five hours of sleep, your risk for dying goes up by like twelve percent. So the sleep is a very powerful predictor of all cause mortality. And I'm not just talking about the amount of sleep, I'm talking about the quality of sleep.

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If you're waking between 1AM and 3AM, your liver might need extra support. Research shows that detoxification has a huge link to our circadian rhythm. This means that waking up in the middle of the night could be linked to your liver. The liver is the key organ for detoxification. The liver naturally does most of its detoxification when you're in your deep non REM sleep, around 12AM to 3AM. It processes and metabolises cholesterol, fatty acids, glucose, thyroid hormones, bile acids, iron, and everything in between. So if your liver is congested or imbalanced, this can affect your wake sleep cycle, your sleep rhythm. Does this sound like it relates to you? Do you think that your liver could be playing a role in the way you sleep or in the way your sleep is being disturbed?

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Poor sleep isn't just about feeling tired. It's wrecking your hormones. From cortisol to ghrelin, it's raising your stress and hunger hormones throughout the day. It increases your risk of insulin resistance, anxiety, brain fog, and even heart disease. And it absolutely tanks your recovery, both physically and mentally. You crave junk, you snap more easily, and your willpower fades. If you're sleeping poorly, everything else becomes an uphill battle.

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Poor sleep negatively impacts hormones, increasing stress and hunger hormones like cortisol and ghrelin. This can raise the risk of insulin resistance, anxiety, brain fog, and heart disease. Poor sleep also impairs physical and mental recovery. It can lead to increased cravings for junk food, irritability, and reduced willpower.

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Sleep consistency, going to bed and waking up at similar times daily, significantly impacts metabolic health, potentially more than people realize. While many focus on getting eight hours of sleep, the timing matters. Bedtime, wake time, meal timing, morning natural light exposure, and evening light reduction entrain our internal clock. Social jet lag, measured by the difference in sleep midpoint between workdays and weekends, indicates sleep consistency. A midpoint difference of more than two hours doubles the risk of metabolic disease. While sleep quality and quantity are widely recognized, consistency is also crucial.

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Sleep is regulated by the circadian rhythm, which responds to light cues by producing melatonin at night and switching it off when it senses light. There are four stages of sleep that the body cycles through four or five times each night. Stages one and two are light sleep, where heart rate and breathing slow, body temperature falls, and muscles may twitch. Stage three, or 'delta sleep', is the first stage of deep sleep where cells produce growth hormone to service bones and muscles, allowing the body to repair itself. Stage four is when dreaming occurs, and the body becomes temporarily paralyzed. During this stage, the brain is extremely active, and eyes dart back and forth. Sleeping less than seven hours per day is associated with an increased risk of developing chronic conditions, which could reduce life expectancy.

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Not getting quality sleep leads to higher levels of cortisol (the stress hormone), higher levels of glucose, higher levels of the hunger hormone ghrelin, and lower levels of the fat-burning, satiety hormone leptin, which the speaker says are all bad and can lead to poor decisions and an unproductive day. Studies from the University of Chicago indicate sleeping less than seven hours is significantly linked to a higher likelihood of diabetes or developing diabetes. Other research shows that lack of sleep for a few days can produce blood sugar levels that mimic prediabetes. A PubMed study found that after one week of short sleep, blood sugar levels are disrupted so significantly that a doctor would classify you as pre diabetic. Additionally, when sleep quality is poor, the beta cells in the pancreas stop being sensitive to the signal of high glucose.

Huberman Lab

Dr. Matt Walker: The Biology of Sleep & Your Unique Sleep Needs | Huberman Lab Guest Series

Guests: Matthew Walker, Allan Rechtschaffen

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In this episode of the Huberman Lab guest series, Andrew Huberman and Dr. Matthew Walker discuss the importance of sleep, its stages, and practical tools for improving sleep quality. Dr. Walker, a professor of neuroscience and psychology and author of *Why We Sleep*, emphasizes the critical role sleep plays in mental and physical health, including its effects on emotional regulation, learning, and neuroplasticity. The conversation begins with an overview of sleep, which is divided into two main types: non-rapid eye movement (non-REM) sleep and rapid eye movement (REM) sleep. Non-REM sleep is further categorized into four stages, with stages three and four representing deep sleep, essential for physical restoration. REM sleep is associated with dreaming and plays a vital role in emotional processing and memory consolidation. The typical sleep cycle lasts about 90 minutes, alternating between non-REM and REM sleep, with the ratio of these stages changing throughout the night. Dr. Walker introduces the QQRT formula—Quality, Quantity, Regularity, and Timing—as a framework for optimizing sleep. Quality refers to the continuity and depth of sleep, while Quantity is the total hours slept, ideally between 7 to 9 hours for adults. Regularity involves maintaining consistent sleep and wake times, while Timing relates to aligning sleep with one’s natural circadian rhythm or chronotype. The discussion highlights that sleep deprivation can lead to significant impairments in cognitive function, emotional regulation, and physical health. For example, a lack of sleep can reduce testosterone levels in men and impair immune function, making individuals more susceptible to illness. Dr. Walker notes that even one night of poor sleep can dramatically affect hormone levels and metabolic health, increasing the risk of conditions like type 2 diabetes. Cortisol, a hormone associated with stress, is also discussed. Its levels naturally rise in the morning to promote wakefulness and decrease during sleep. Sleep helps regulate cortisol levels, and disturbances in sleep can lead to elevated cortisol, contributing to stress and anxiety. The episode concludes with practical advice for improving sleep, such as creating a conducive sleep environment, managing light exposure, and avoiding stimulants before bedtime. Dr. Walker emphasizes the importance of understanding one’s sleep patterns and making adjustments to enhance sleep quality, ultimately leading to better overall health and well-being.