What Is Tryptophan?
Tryptophan is an amino acid that can be found in foods and is sold as a supplement. Learn more about which foods contain it, as well as supplement safety.| Sleep Foundation
Tryptophan is an amino acid that can be found in foods and is sold as a supplement. Learn more about which foods contain it, as well as supplement safety.| Sleep Foundation
Looking for the perfect bedtime concoction to help you get a good night’s sleep? We’ve prepared six bedtime mocktails to do just the trick.| Sleep Foundation
People with back pain need a mattress that offers optimal spinal support and pressure relief. See which of the 75 mattresses we tested scored the best.| Sleep Foundation
Blue light decreases melatonin levels and may delay or disrupt sleep in children. Learn about how you can reduce blue light exposure before bedtime.| Sleep Foundation
Yoga nidra is a form of yoga that involves lying on your back while focusing on mental imagery. Yoga nidra may promote relaxation and improve sleep.| Sleep Foundation
Non-sleep deep rest (NSDR) is a relaxation practice promoted by Stanford neurobiologist Andrew Huberman. Learn more about how NSDR works and its benefits.| Sleep Foundation
Are you interested in trying meditation for sleep? Learn the science behind this mind-body technique and how to use it to relieve stress at bedtime.| Sleep Foundation
Night terrors are common in children, and can cause them to wake up screaming and afraid. Learn why night terrors happen and how to stop them.| Sleep Foundation
Want to learn more about nightmares in children? Our guide discusses what causes nightmares in children, strategies for kids having nightmares, and more.| Sleep Foundation
Vivid dreams are common and their content can range from pleasant to disturbing. Learn why vivid dreams happen and what to do if you want to avoid them.| Sleep Foundation
Patients with COPD commonly experience difficulty breathing at night and lost sleep. A co-occurring sleep-related breathing disorder may make matters worse.| Sleep Foundation
Sleep issues are common after a traumatic experience. Understanding the links between trauma and sleep can aid in healing and promote restful sleep after trauma.| Sleep Foundation
Everyone knows sleep is important, but can you die from not sleeping? Learn about the effects of sleep loss as well as tips for how to get enough sleep.| Sleep Foundation
A new study examines the effect that chronic noise pollution during our sleep has on our cardiovascular systems.| Sleep Foundation
Looking for ways to fall asleep fast? We share the relaxation methods that can help you clear your mind and get to sleep quickly.| Sleep Foundation
Curious about green noise and whether it can help you sleep? We highlight what green noise sounds like, who may benefit from it, and how to use it for sleep.| Sleep Foundation
Our guide to the best white noise machines will help you find the best sound machine for sleep and walk you through the most important features.| Sleep Foundation
White noise can help you relax and drift off to sleep. Discover the best smartphone apps that let you choose from a plethora of sounds and make your own mixes.| Sleep Foundation
Night mode filters out blue light that disrupts sleep, but does it have to make your screen yellow? Research shows it’s not the screen color that matters.| Sleep Foundation
Reading before bed might be able to help you get a better night’s sleep. Learn about why and how to integrate reading into your bedtime routine.| Sleep Foundation
Blue light exposure from screens and artificial lights may be disturbing your sleep. Find the best blue light blocking glasses to wear before bed.| Sleep Foundation
A bedtime routine is a set of activities performed in the same order each night before bed. Learn why they are important, and get tips for your routine.| Sleep Foundation
An alternative to CPAP, hypoglossal nerve stimulation involves an implanted device that can improve the sleep of people with obstructive sleep apnea.| Sleep Foundation
Unlike CPAP machines, ASV machines dynamically adjust air pressure levels throughout the night. Learn why this may be better for certain types of sleep apnea.| Sleep Foundation
Wondering how BiPAP machines work? Learn all about BiPAP therapy, how it compares to CPAP, and how to get started using BiPAP machines.| Sleep Foundation
EPAP (expiratory positive airway pressure) therapy is an effective treatment for obstructive sleep apnea. Learn more about this alternative to the CPAP machine.| Sleep Foundation
Find out what an APAP machine is, how it works, and why it’s an effective treatment for obstructive sleep apnea. Then, discover where and how to get one.| Sleep Foundation
When should you talk to your doctor about sleep problems? Discover the telltale signs, get tips for how to talk to your doctor about sleep, and learn what to expect at your appointment.| Sleep Foundation
Sleep is vital for heart health. Learn about the impact of sleep deprivation on blood pressure and the risk of heart attacks, heart disease, and strokes.| Sleep Foundation
Looking to sleep more soundly in the new year? Learn how limiting your alcohol intake — even for a month — comes with sleep benefits.| Sleep Foundation
In central sleep apnea, a lack of signals from the brain interrupts breathing during sleep. Learn more about this uncommon condition.| Sleep Foundation
Drinking alcohol may contribute to sleep apnea. Learn how alcohol affects breathing and why avoiding alcohol may be suggested if you have sleep apnea.| Sleep Foundation
Diet, exercise, and sleep all contribute to a healthy life. We explore the relationships between these important lifestyle factors.| Sleep Foundation
Wondering what to eat before bed? We share nutritious bedtime snack options to beat hunger cravings without ruining your sleep.| Sleep Foundation
Sleeping in the dark is critical for getting a good night’s sleep. Explore tips for making your bedroom as dark as possible.| Sleep Foundation
Do you think you have poor sleep quality? Learn to recognize the signs of lack of sleep, and get tips for improving your sleep quality.| Sleep Foundation
Visit the pages below to learn about different types of sleep disorders and their symptoms, how they're diagnosed and treated, and more.| Sleep Foundation
Nocturia can disrupt sleep and signal more serious health concerns. Learn what causes nighttime bathroom trips and how to reduce them for better sleep.| Sleep Foundation
Getting the sleep you need is vital for your immune system. Lack of sleep can disrupt your immune defense, raising the risk for short- and long-term illnesses.| Sleep Foundation
Narcolepsy is a sleep disorder that involves severe daytime sleepiness. Learn about the types of narcolepsy as well as the symptoms, causes, and treatments.| Sleep Foundation
Sleep and job performance are closely related. Learn how work stress can make it more difficult to sleep, and how sleep issues can reduce productivity at work.| Sleep Foundation
Using CDC health data, we’ve compiled the 10 best and 10 worst U.S. cities for sleep as they relate to varying health factors. How does your city rate?| Sleep Foundation
Is your sleep repeatedly disrupted during the night? Learn about interrupted sleep including its causes, consequences, and steps you can take to prevent it.| Sleep Foundation
Want to learn more about the mechanics of sleeping upright or standing up? Our guide includes tips for getting enough rest on long flights or drives.| Sleep Foundation
Many people turn to coffee to wake up, but some find that it makes them more tired. Learn why coffee might sometimes make you sleepy.| Sleep Foundation
Want to learn more about over-the-counter sleep medications? Our guide covers melatonin, valerian, and other OTC options that may help you sleep better.| Sleep Foundation
Dehydration can lead to poor sleep, and poor sleep can often lead to dehydration. Learn how to stay hydrated at night and to avoid frequent bathroom visits.| Sleep Foundation
Learn how to reset your circadian rhythms, including your sleep-wake schedule, through light exposure, exercise, strategic meal times, and more.| Sleep Foundation
Wondering how much melatonin you should take? We’ve got you covered. Learn more about dosage recommendations for adults and children.| Sleep Foundation
Are Cozy Earth’s sheets right for you? Find out more about how they’re made, how much they cost, and other factors to consider before buying.| Sleep Foundation
At SleepFoundation.org, we combine decades of experience in sleep health education with comprehensive product testing and the latest in sleep research to put you on the path to good sleep.| Sleep Foundation
Learn how glucose levels naturally change during sleep, how the duration and quality of sleep impact blood sugar, and how sleep problems affect blood sugar.| Sleep Foundation
A mattress is a considerable purchase, so it’s important to get the size right. We cover mattress dimensions and tips for choosing an appropriate size.| Sleep Foundation
Explore the link between stress and insomnia, and learn ways to relieve stress to improve sleep quality.| Sleep Foundation
This guide helps you find the best pillow for you by outlining exactly which factors are most important in pillow shopping.| Sleep Foundation
We’ve put together a list of the best blankets, from warm comforters to the softest of throws, as well as a walk-through of everything you need to know before shopping.| Sleep Foundation
A damp environment enables growth of potentially harmful mold. Learn about the effects of mold on sleep and how to prevent and eliminate mold from your bedroom.| Sleep Foundation
Wondering how smells and aromatherapy can impact sleep? Learn about how smell affects sleep and what scents help you relax at night or wake up in the morning.| Sleep Foundation
We explain what a hybrid mattress is, examining its construction, materials, and performance. We also share tips on how to find the best model for your needs.| Sleep Foundation
REM sleep is known for dreaming, but much more happens during this critical sleep stage. Learn what REM sleep involves and how much REM sleep you need.| Sleep Foundation
Deep sleep gives your body a chance to repair and recover and leaves you refreshed in the morning. Learn how much deep sleep you need and how to get more.| Sleep Foundation
Scientific Advisor Matthew Walker, Ph.D. Matthew Walker, Ph.D., is professor of neuroscience and psychology at the University of California, Berkeley, and| Sleep Foundation
Research shows that tart cherry juice can help you sleep, aid in muscle recovery, and promote brain health. Learn how it works and how much to drink.| Sleep Foundation
Learn about the best pregnancy sleeping positions, problems that affect sleep during pregnancy, and why it’s important to sleep well when you’re expecting.| Sleep Foundation
Getting older can affect the quality and duration of sleep. Learn more about the complex relationship between aging and sleep and how to get better rest.| Sleep Foundation
If stress or anxiety is keeping you awake at night, try these gentle exercises to calm your body and mind.| Sleep Foundation
Nightmares can affect anyone, and when frequent, can harm sleep and daily life. Learn about nightmares, their causes, & how to reduce them.| Sleep Foundation
Can’t sleep? We offer tested tips and relaxation exercises to calm your mind and help you get the sleep you need.| Sleep Foundation
Dreams are an integral part of sleep. Learn about when we dream, the types of dreams, and the competing theories for why we dream in the first place.| Sleep Foundation
Poor sleep is common to the grieving process, and may even be a risk factor for complicated grief. Learn how grief affects sleep, and how therapy can help.| Sleep Foundation
Worried about snoring? Learn the basics, including what causes snoring, when it is dangerous, and how it can be treated to promote both sleep and health.| Sleep Foundation
Though CPAP therapy is the most common sleep apnea treatment, other options exist. We look at PAP devices, surgeries, and lifestyle changes for sleep apnea.| Sleep Foundation
Sleep apnea is a common breathing disorder that increases the risk of a multitude of health conditions. Learn why this may include heart disease.| Sleep Foundation
Learn about the relationship between sleep apnea and high blood pressure, how sleep apnea treatment can help, and when to speak with a doctor.| Sleep Foundation
Light therapy can be done at home and helps relieve sleep issues associated with insomnia and some types of depression.| Sleep Foundation
Excessive daytime sleepiness can have serious effects on health and quality of life. Learn the causes and how to treat them.| Sleep Foundation
Continuous positive airway pressure (CPAP) therapy is often used to treat obstructive sleep apnea and other types of sleep-disordered breathing.| Sleep Foundation
Noise has a major impact on sleep. Exposure to too much noise during sleep has immediate effects while we are sleeping, which leads to short-term issues the next day, and over time may result in long-term mental and physical consequences.| Sleep Foundation
Worried about feeling alert and maintaining a healthy sleep schedule after a long flight? Learn how to reduce jet lag and sleep better while traveling.| Sleep Foundation
Naps are a common practice around the world to restore energy during the day. Learn about the benefits of napping and tips for getting a good daytime snooze.| Sleep Foundation
Your chronotype dictates whether you are a night owl or an early bird. Understanding your chronotype can help you function better and sleep more soundly.| Sleep Foundation
Learn about delayed sleep phase syndrome, a circadian rhythm disorder that affects your ability to fall asleep and wake up at socially normal times.| Sleep Foundation
Sleep is a complex and dynamic biological process that still isn’t fully understood. Learn about how sleep works and why it’s vital for overall health.| Sleep Foundation
Thinking of freshening up your bed with new sheets? Explore our list of the best sheets in multiple categories along with useful tips for shopping for bedding.| Sleep Foundation
What are the best comforters? We break down our top picks, from down comforters to down alternatives, to help shoppers find the best fit for their needs.| Sleep Foundation
A sleep study provides crucial information to diagnose and treat sleep disorders. Learn about the types of sleep studies, how they're used, and what to expect.| Sleep Foundation
Sleep satisfaction and energy levels are closely linked. In this guide, learn how sleep patterns can help you keep your energy high during the day.| Sleep Foundation
Your sleep environment is crucial to getting quality rest. Learn how to take advantage of visual and practical design to create the ideal bedroom for sleep.| Sleep Foundation
Understanding the link between sleep and depression can help improve your sleep quality and better manage your mental health.| Sleep Foundation
Is acid reflux interrupting your sleep? Learn how GERD can disrupt sleep, and what steps you can take to reduce it and get better sleep.| Sleep Foundation
Many research studies suggest that diet and nutrition impact sleep. Learn which foods to eat and which to avoid if you want healthy sleep.| Sleep Foundation
Sleep is an essential building block for your child’s mental and physical health. But if you’re finding it impossible to help your toddler sleep, you’re not alone.| Sleep Foundation
Sleep apnea is a relatively common disorder in which people experience disrupted breathing while they are sleeping.| Sleep Foundation
Want to learn about shift work disorder? Our guide discusses the defining traits of shift work sleep disorder, how it disrupts sleep & complications.| Sleep Foundation
Circadian rhythm sleep disorders occur when a person's internal schedule mismatches with the schedule of their environment. Learn about symptoms and treatments.| Sleep Foundation
Considering melatonin supplements to help you sleep? We break down benefits, risks, side-effects, and how to choose the best product for you.| Sleep Foundation
Over the past decade, we've tested more than 2,000 mattresses in our Seattle-based lab. Find out which ones fared the best and discover your perfect mattress.| Sleep Foundation
Losing sleep may counter efforts to lose weight and even lead to weight gain. Learn more about the complex relationship between weight and sleep.| Sleep Foundation
Healthy sleep consists of distinct stages. We break down the defining traits of each stage and how they differ from one another.| Sleep Foundation
Worried about nodding off behind the wheel? Learn about the causes and dangers of drowsy driving and practical tips to recognize and avoid driving when tired.| Sleep Foundation
