Sleep Health

How sleep affects overall health and how to improve it.

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Adenosine, Cortisol, and Melatonin: The Hormones Running Your Sleep
Sleep Science

Adenosine, Cortisol, and Melatonin: The Hormones Running Your Sleep

Three key chemicals orchestrate when you feel sleepy, when you wake, and how deeply you rest. A plain-language breakdown of the science behind each one.

By Sleep Health Editorial Team · Sep 3, 2023 · 6 min read

Latest In Sleep Health

Common Misconceptions About Sleep, Corrected by Research
Sleep Science

Common Misconceptions About Sleep, Corrected by Research

Sleep Health Editorial Team · Sep 25, 2023 · 6 min read
Evening Light Exposure and Sleep Quality: What the Research Shows
Sleep Science

Evening Light Exposure and Sleep Quality: What the Research Shows

Sleep Health Editorial Team · Aug 7, 2026 · 8 min read
Habits That Quietly Undermine Your Sleep Architecture
Sleep Science

Habits That Quietly Undermine Your Sleep Architecture

Sleep Health Editorial Team · Dec 14, 2024 · 6 min read
Napping: When It Supports Recovery and When It Backfires
Sleep Science

Napping: When It Supports Recovery and When It Backfires

Sleep Health Editorial Team · Feb 5, 2026 · 6 min read
REM Sleep vs. Deep Sleep: Two Stages, Very Different Jobs
Sleep Science

REM Sleep vs. Deep Sleep: Two Stages, Very Different Jobs

Sleep Health Editorial Team · Jul 25, 2026 · 6 min read
Short Sleepers and Long Sleepers: What Genetic Research Tells Us
Sleep Science

Short Sleepers and Long Sleepers: What Genetic Research Tells Us

Sleep Health Editorial Team · Dec 27, 2024 · 8 min read
Sleep Across the Lifespan: How Biology Changes From Infancy to Old Age
Sleep Science

Sleep Across the Lifespan: How Biology Changes From Infancy to Old Age

Sleep Health Editorial Team · Jul 28, 2025 · 6 min read
Sleep Science for Beginners: Understanding Rest Without the Jargon
Sleep Science

Sleep Science for Beginners: Understanding Rest Without the Jargon

Sleep Health Editorial Team · Sep 12, 2025 · 8 min read
Sleep Science: A Complete Guide to How Rest Works in the Human Body
Sleep Science

Sleep Science: A Complete Guide to How Rest Works in the Human Body

Sleep Health Editorial Team · Oct 14, 2023 · 8 min read
Sleep Timing vs. Sleep Duration: Which Matters More for Health?
Sleep Science

Sleep Timing vs. Sleep Duration: Which Matters More for Health?

Sleep Health Editorial Team · Jun 5, 2024 · 6 min read
Temperature, Your Body Clock, and the Science of Falling Asleep Faster
Sleep Science

Temperature, Your Body Clock, and the Science of Falling Asleep Faster

Sleep Health Editorial Team · Nov 14, 2025 · 7 min read
The Architecture of a Night's Sleep: Cycles, Stages, and What They Do
Sleep Science

The Architecture of a Night's Sleep: Cycles, Stages, and What They Do

Sleep Health Editorial Team · Jul 12, 2023 · 8 min read
What Happens in Your Brain During Sleep: A Stage-by-Stage Breakdown
Sleep Science

What Happens in Your Brain During Sleep: A Stage-by-Stage Breakdown

Sleep Health Editorial Team · Feb 9, 2026 · 6 min read
What Your Circadian Rhythm Is Actually Doing While You Live Your Life
Sleep Science

What Your Circadian Rhythm Is Actually Doing While You Live Your Life

Sleep Health Editorial Team · May 13, 2024 · 7 min read
Why Sleep Deprivation Hits Harder Than Most People Realize
Sleep Science

Why Sleep Deprivation Hits Harder Than Most People Realize

Sleep Health Editorial Team · Feb 10, 2025 · 7 min read
Alcohol and Sleep: Why a Nightcap Often Backfires
Sleep Habits

Alcohol and Sleep: Why a Nightcap Often Backfires

Sleep Health Editorial Team · Aug 18, 2025 · 7 min read
Building a Sleep Habit That Lasts: A Comprehensive Approach
Sleep Habits

Building a Sleep Habit That Lasts: A Comprehensive Approach

Sleep Health Editorial Team · Sep 16, 2025 · 8 min read
Caffeine's Hidden Timeline: How Long It Actually Stays in Your System
Sleep Habits

Caffeine's Hidden Timeline: How Long It Actually Stays in Your System

Sleep Health Editorial Team · Nov 8, 2023 · 5 min read
Common Thinking Patterns That Keep Your Brain Wired at Bedtime
Sleep Habits

Common Thinking Patterns That Keep Your Brain Wired at Bedtime

Sleep Health Editorial Team · Jul 4, 2025 · 5 min read
Evening Wind-Down Routines: What Sleep Researchers Actually Recommend
Sleep Habits

Evening Wind-Down Routines: What Sleep Researchers Actually Recommend

Sleep Health Editorial Team · Apr 13, 2024 · 6 min read
Exercise and Sleep: How Physical Activity Timing Shapes Rest Quality
Sleep Habits

Exercise and Sleep: How Physical Activity Timing Shapes Rest Quality

Sleep Health Editorial Team · Dec 17, 2024 · 5 min read
Napping Done Right: Timing, Length, and Who Benefits Most
Sleep Habits

Napping Done Right: Timing, Length, and Who Benefits Most

Sleep Health Editorial Team · Jan 19, 2024 · 7 min read
Screens Before Bed: Separating the Real Effects from the Overhyped Ones
Sleep Habits

Screens Before Bed: Separating the Real Effects from the Overhyped Ones

Sleep Health Editorial Team · May 6, 2025 · 6 min read
Sleep Hygiene From the Ground Up
Sleep Habits

Sleep Hygiene From the Ground Up

Sleep Health Editorial Team · Jan 19, 2025 · 7 min read
Sleeping in on Weekends vs. Keeping a Fixed Schedule
Sleep Habits

Sleeping in on Weekends vs. Keeping a Fixed Schedule

Sleep Health Editorial Team · Aug 11, 2025 · 6 min read
Temperature's Outsized Role in Falling and Staying Asleep
Sleep Habits

Temperature's Outsized Role in Falling and Staying Asleep

Sleep Health Editorial Team · Jun 6, 2026 · 8 min read
The Science Behind a Consistent Bedtime — and Why Irregular Hours Cost You
Sleep Habits

The Science Behind a Consistent Bedtime — and Why Irregular Hours Cost You

Sleep Health Editorial Team · Jan 23, 2023 · 9 min read
What 'Sleep Debt' Really Means — and Whether You Can Pay It Back
Sleep Habits

What 'Sleep Debt' Really Means — and Whether You Can Pay It Back

Sleep Health Editorial Team · May 22, 2023 · 6 min read
Your Bedroom Environment Is Quietly Sabotaging Your Sleep
Sleep Habits

Your Bedroom Environment Is Quietly Sabotaging Your Sleep

Sleep Health Editorial Team · Mar 20, 2023 · 8 min read
Your Pre-Sleep Checklist for a Better Night
Sleep Habits

Your Pre-Sleep Checklist for a Better Night

Sleep Health Editorial Team · Dec 25, 2024 · 5 min read
Circadian Rhythm Disorders: When Your Internal Clock Falls Out of Sync
Sleep Disorders

Circadian Rhythm Disorders: When Your Internal Clock Falls Out of Sync

Sleep Health Editorial Team · Sep 10, 2023 · 8 min read
Cognitive Behavioral Therapy for Insomnia: What the Evidence Actually Shows
Sleep Disorders

Cognitive Behavioral Therapy for Insomnia: What the Evidence Actually Shows

Sleep Health Editorial Team · Nov 13, 2025 · 6 min read
Common Misconceptions About Sleeping Pills and Sleep Aids
Sleep Disorders

Common Misconceptions About Sleeping Pills and Sleep Aids

Sleep Health Editorial Team · Nov 3, 2025 · 6 min read
How Sleep Disorders Are Diagnosed: From Self-Reported Symptoms to Sleep Studies
Sleep Disorders

How Sleep Disorders Are Diagnosed: From Self-Reported Symptoms to Sleep Studies

Sleep Health Editorial Team · Mar 20, 2024 · 6 min read
Insomnia, Hypersomnia, and Parasomnia: Understanding the Three Broad Categories of Sleep Disorders
Sleep Disorders

Insomnia, Hypersomnia, and Parasomnia: Understanding the Three Broad Categories of Sleep Disorders

Sleep Health Editorial Team · Aug 6, 2026 · 7 min read
Narcolepsy Is Not Just Falling Asleep Without Warning
Sleep Disorders

Narcolepsy Is Not Just Falling Asleep Without Warning

Sleep Health Editorial Team · Feb 1, 2025 · 5 min read
Obstructive Sleep Apnea vs. Central Sleep Apnea: Two Conditions That Share a Name
Sleep Disorders

Obstructive Sleep Apnea vs. Central Sleep Apnea: Two Conditions That Share a Name

Sleep Health Editorial Team · Sep 27, 2025 · 5 min read
Restless Legs Syndrome: Recognizing the Urge That Keeps People Awake
Sleep Disorders

Restless Legs Syndrome: Recognizing the Urge That Keeps People Awake

Sleep Health Editorial Team · Apr 15, 2023 · 7 min read
Short Sleep vs. Insomnia: Why the Difference Matters More Than You Think
Sleep Disorders

Short Sleep vs. Insomnia: Why the Difference Matters More Than You Think

Sleep Health Editorial Team · Nov 2, 2024 · 6 min read
Sleep Disorder Red Flags: Signs Worth Bringing Up With a Doctor
Sleep Disorders

Sleep Disorder Red Flags: Signs Worth Bringing Up With a Doctor

Sleep Health Editorial Team · Jul 30, 2023 · 5 min read
Sleep Disorders Across the Lifespan: How Conditions Shift From Childhood to Old Age
Sleep Disorders

Sleep Disorders Across the Lifespan: How Conditions Shift From Childhood to Old Age

Sleep Health Editorial Team · Feb 24, 2025 · 6 min read
Sleep Disorders Explained: What They Are and Why They Matter
Sleep Disorders

Sleep Disorders Explained: What They Are and Why They Matter

Sleep Health Editorial Team · Dec 24, 2024 · 8 min read
Sleep Talking, Sleepwalking, and Night Terrors: Inside the World of Parasomnias
Sleep Disorders

Sleep Talking, Sleepwalking, and Night Terrors: Inside the World of Parasomnias

Sleep Health Editorial Team · Feb 2, 2025 · 6 min read
What Happens in Your Body During a Night of Disrupted Sleep
Sleep Disorders

What Happens in Your Body During a Night of Disrupted Sleep

Sleep Health Editorial Team · Sep 9, 2023 · 8 min read
Why Sleep Disorders Often Go Undiagnosed for Years
Sleep Disorders

Why Sleep Disorders Often Go Undiagnosed for Years

Sleep Health Editorial Team · Jun 4, 2026 · 5 min read

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