When we think about improving sleep, we often focus on routines—limiting screen time, creating a relaxing bedtime environment, or sticking to a schedule. But there’s another factor that’s gaining attention: gut health.
Emerging research suggests that what’s happening in your digestive system may play a role in how well you sleep and how rested you feel the next day.
What Is Gut Health, Exactly?
Your gut is home to trillions of microorganisms, collectively known as the gut microbiota (PubMed Central 2024, “The Role of Gut Microbiome in Sleep Quality and Health”).
These bacteria help with:
- Digestion
- Nutrient absorption
- Immune function
- And even communication with the brain
This connection between the gut and brain is often referred to as the gut-brain axis—a two-way communication system that links emotional and physical health (Cleveland Clinic 2023, “Gut Microbiome”).
How the Gut Influences Sleep
- The Gut Helps Regulate Sleep Hormones
Your gut plays a role in producing key compounds involved in sleep, including:
- Serotonin, which helps regulate mood
- Melatonin, the hormone that controls your sleep-wake cycle
In fact, a large portion of serotonin is produced in the gut. When the microbiome is balanced, these processes may function more smoothly (The Real Gut Doctor 2025, “The Gut-Sleep Connection: How Your Microbiome Affects Rest”).
- Inflammation and Sleep Quality
An imbalanced gut (sometimes referred to as dysbiosis) may contribute to increased inflammation in the body.
Elevated inflammation has been associated with:
- Poor sleep quality
- Frequent nighttime awakenings
- Daytime fatigue
(The Institute for Functional Medicine 2025, “Lifestyle Factors and Gut Health: A Focus on Sleep”).
- Digestive Discomfort Can Disrupt Sleep
Everyday digestive issues—like bloating, reflux, or discomfort—can make it harder to fall asleep or stay asleep.
Conditions such as acid reflux (GERD) are especially known for worsening at night, often interrupting rest.
- The Stress Connection
The gut and brain are constantly communicating.
Stress can affect digestion—and in turn, poor gut health may contribute to:
- Difficulty falling asleep
- Restless or fragmented sleep
This creates a cycle where both sleep and gut health can influence each other over time (Ann Harbor Holistic Medicine, “How Stress Harms Your Gut and What to Do About It”).
What This Means for Sleep Health
While gut health is just one piece of the puzzle, it highlights how interconnected the body’s systems are.
Supporting your gut may also support:
- More consistent sleep patterns
- Improved overall comfort at night
- Better daytime energy levels
Simple Ways to Support Both Gut Health and Sleep
Small, consistent habits can make a difference:
- Eat a balanced diet with fiber-rich foods like fruits, vegetables, and whole grains
- Incorporate fermented foods like yogurt or kefir when possible
- Stay hydrated throughout the day
- Limit heavy or late-night meals close to bedtime
- Maintain a consistent sleep schedule
Where Sleep Disorders Fit In
For individuals with sleep-related breathing disorders like sleep apnea, sleep quality may already be disrupted.
While gut health alone isn’t a solution, taking a whole-body approach to sleep health—including comfort, consistency, and overall wellness—can be an important part of the bigger picture.
The Bottom Line
Sleep doesn’t happen in isolation. From your brain to your gut, multiple systems work together to support restful sleep.
By paying attention to gut health alongside sleep habits, you may be able to create a stronger foundation for feeling well-rested and refreshed.