Eating More Fiber May Be One of the Simplest Ways to Improve Sleep



Medically reviewed by Valerie Cacho, MD

Credit: Xavier Lorenzo / Getty Images
Credit: Xavier Lorenzo / Getty Images
  • Fiber may support better sleep by promoting gut health, reducing inflammation, and helping regulate blood sugar and sleep-related hormones.
  • Eating more fruits, vegetables, legumes, and whole grains can help you meet daily fiber needs.
  • A consistent sleep schedule, a relaxing bedtime routine, and limiting caffeine and screen time before bed can also improve sleep quality.

Going to bed around the same time every night, having a calming pre-sleep routine, and correcting vitamin and mineral deficiencies are all evidence-based ways to improve sleep, but what about dietary choices, like fiber intake? While you’ve probably heard that increasing fiber can improve gut and heart health, you may not be aware that it may help you sleep better.

How Fiber Impacts Sleep

Fiber plays many important roles in health, such as regulating blood lipid levels, promoting regular bowel movements, and fueling the growth of beneficial bacteria in your gut. 

While it’s usually not thought of as important for sleep, research shows that getting enough fiber may be key for healthy sleep cycles.

Studies show that people who eat more fiber have a lower risk of sleep disorders, like insomnia, while low fiber intake is linked with lighter, less restorative sleep and more nighttime awakenings.

Though researchers are still investigating how increasing dietary fiber may help with sleep, it’s thought that fiber improves sleep by impacting gut health, neurotransmitters, and blood sugar. 

1. Regulating Inflammation

Fiber fuels beneficial bacteria in the large intestine that produce compounds known as short-chain fatty acids (SCFAs), which work to protect and maintain gut health.  

In addition to maintaining the integrity of the intestinal barrier, SCFA’s reduce inflammation. Having elevated levels of inflammation is linked to a number of health issues, including poor sleep and sleep disorders like insomnia.

Therefore, fiber may support more restful sleep through its inflammation-regulating properties. 

2. May Impact Neurotransmitters

Fiber may also influence the production of neurotransmitters involved in sleep regulation, like serotonin. Some research suggests that higher fiber intake may increase serotonin production. 

Serotonin is a precursor for melatonin, a hormone that regulates your sleep-wake cycleSince. 

Being that around 90% of your serotonin is produced in the intestines, it’s essential to keep your gut healthy by eating plenty of fiber.

3. Supports Stable Blood Sugar

Adding more fiber to your diet is an effective way to lower blood sugar levels and improve overall blood sugar management.

Having uncontrolled blood sugar can significantly impact your sleep quality, as fluctuations can increase nighttime awakenings and reduce your overall sleep quality.

Fiber slows digestion, which slows the absorption of sugar into the bloodstream and reduces rapid spikes and crashes in blood sugar. This can help stabilize blood sugar overnight, supporting more restful sleep. 

How Much Fiber Should You Eat?

If you’re wondering how much fiber you should be aiming for per day, it depends on your age and gender. a Daily Value (DV) is Here are the current daily fiber recommendations set by the United States Institute of Medicine (IOM). 

Age Female  Male 
1-3 years 14 grams 14 grams 
4-8 years 16.8 grams  19.6 grams 
9-13 years 22.4 grams  25.2 grams 
14-18 years  25.2 grams  30.8 grams 
19-50 years 25 grams  38 grams 
51 and older 21 grams  30 grams 

In addition to these specific recommendations, there is a Daily Value (DV) set for fiber. DVs are used to represent the amount of nutrients recommended to consume each day based on a 2,000-calorie diet. The DV for fiber is currently set at 28 grams per day.

Hitting your daily fiber intake goals can help support overall health and reduce the risk of many common health conditions, like colon cancer, heart disease, and type 2 diabetes. 

To reach these intake recommendations, it’s best to include a variety of high-fiber foods, like legumes, fruits, vegetables, and whole grains. 

Other Ways to Improve Sleep

In addition to increasing your fiber intake, there are several other evidence-based ways to improve sleep: 

  • Stick to a consistent sleep schedule: Going to bed and waking up around the same time each day may help support your body’s natural sleep-wake cycle.
  • Avoid stimulants before bed: Stimulants, like caffeine, can interfere with your ability to fall asleep and stay asleep.
  • Create a relaxing nighttime routine: A soothing nighttime routine, like engaging in reading or stretching, or taking a warm bath, can help you relax and get to bed easier. 
  • Keep your bedroom cool, dark, and quiet: An ideal sleep environment is dark and cool. Try using a sleep mask if you have ambient light in your room. 
  • Limit screen time before bed: Scrolling on your phone or using your computer before bed can make it harder for you to fall asleep.

If you’re experiencing ongoing sleep problems, it’s important to discuss them with your healthcare provider. Sleep difficulties can sometimes be linked to underlying medical conditions, nutrient deficiencies, medications, or hormonal changes that require proper evaluation and treatment by a qualified healthcare professional.



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Recent Reviews



Medically reviewed by Robert Burakoff, MD

Drinking herbal tea and winding down with a relaxing activity can help soothe your gut at night.Credit: Drazen Zigic / Getty Images
Drinking herbal tea and winding down with a relaxing activity can help soothe your gut at night.
Credit: Drazen Zigic / Getty Images
  • Small habits in the evening can influence your gut health.
  • Eating a Mediterranean-style dinner, drinking a cup of herbal tea, and taking an after-dinner walk are simple ways to support your gut health in the evening.
  • Stress management, a regular bedtime routine, and getting seven to nine hours of sleep each night help anchor your circadian rhythm, which may keep your gut bacteria balanced.

Gut health is something you can work at improving at all hours of the day. Here are seven simple habits you can do in the evening hours to support gut health.

1. Have a Mediterranean Dinner

Following the basics of the Mediterranean diet at dinner could support your gut health in the evening and beyond. This includes:

  • Fresh fruits and vegetables
  • Legumes
  • Whole grains
  • Poultry
  • Fish
  • Healthy fats, like olive oil

The foods you eat determine the makeup of your gut microbiome, or the system of microorganisms that live in your gastrointestinal tract. Whole foods and minimally processed foods contain nutrients, such as fiber, vitamins, and minerals, that support a balanced gut.

The Mediterranean diet is known for its health benefits, including reduced inflammation and improved overall health. Research also shows that the diet has a positive impact on the gut. People who followed a Mediterranean diet were found to have more microorganisms in their gut compared to people who ate a diet higher in sugar, fat, and salt.

2. Finish Eating 2-3 Hours Before Bed

Eating too close to bedtime could disrupt your sleep and impact gut health. A meal that isn't fully digested can cause unpleasant digestive symptoms, especially if you're prone to indigestion. While there are no rules about when to stop eating before bed, finishing your last full meal two to three hours before bedtime can give your body enough time to digest.

New, early research suggests that eating late at night may negatively affect the gut. The researchers found connections between stress, late-night eating, and bowel issues. Those who had both high stress and late-night eating patterns were 2.5 times more likely to also report bowel problems and have lower gut microbiome diversity.

If you need a snack after dinner, opt for foods that have protein, fiber, or healthy fats, including:

  • Fruits, like berries or kiwi
  • Low-fat yogurt
  • Nuts
  • While grains
  • Fermented foods like kimchi, kefir, or kombucha

3. Take a Walk After Dinner

An evening stroll can have benefits beyond getting in your daily steps. It could also help your body move food through the digestive system.

You don't have to walk for that long, either. In one four-week study, researchers found that a 10-15-minute walk after a meal was more effective than a prokinetic medication for easing bloating and discomfort in adults who regularly experience bloating.

If you can't walk around the neighborhood, even standing up and moving your body around the room could help.

4. Have a Cup of Herbal Tea

Sipping a caffeine-free herbal tea in the evening can be a relaxing ritual. Certain teas, including ginger and peppermint tea, can also help with digestion and ease unpleasant symptoms such as gas and bloating.

Ginger is known for easing stomach discomfort. Drinking ginger tea can help with gas and bloating because ginger reduces constipation and the breakdown of undigested nutrients in the gut. You can buy dried ginger tea in a bag or make it from fresh ginger. It's generally considered safe to drink in moderate amounts daily.

Peppermint can help with cramping and bloating. The tea is made from peppermint leaves and is generally considered safe. One thing to note is that peppermint can also trigger indigestion, so if you're prone to heartburn, it might not be a good choice.

5. Pick a Wind-Down Practice

The brain and gut are connected. Stress affects gut health, and higher stress levels are linked to stomach issues such as nausea, constipation, and diarrhea. When your stress hormones are high, it can lead to increased gut inflammation and potentially an imbalance in gut bacteria.

Choosing a relaxing activity to practice in the evenings could help lower your stress, which can also benefit your gut. Try a mind-body or mental health practice, such as:

  • Meditation
  • Breathing exercises
  • Yoga
  • Journaling
  • Gratitude affirmations

Some evidence suggests that slow, deep breathing has positive impacts on the gut, such as improving symptoms in people with irritable bowel syndrome (IBS).

6. Keep Bedtime Consistent

Having a regular bedtime routine can help you get more consistent sleep, which may also positively affect your gut. Research suggests that changes to your sleep cycle can affect your gut microbiome. Keeping a regular sleep and wake time anchors the circadian rhythm. Even a few days of irregular sleep could impact your gut.

While researchers are still learning about the complex connection between the gut and sleep, it appears as though sleep disturbances can change the gut's makeup and function. Setting a regular bedtime and wake time and sticking to it as closely as possible could benefit your gut health.

7. Get Enough Sleep

Something as simple as regularly getting enough sleep could have a big impact on your gut health. Experts recommend that adults get between seven and nine hours of sleep each night. Sleeping less than seven hours could put you at risk for health issues.

Shorter sleep time can affect the gut microbiome, potentially causing an imbalance that could lead to inflammation and metabolic problems.

The relationship between sleep and your gut seems to work both ways. Just as poor sleep can negatively affect gut health, an unbalanced gut may contribute to sleep troubles. If you're not consistently getting the recommended amount of sleep and aren't able to improve your sleep with at-home habits, it might be worth asking a healthcare provider for help.



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