How To Sleep Better While Intermittent Fasting

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How To Sleep Better While Intermittent Fasting

In the quest for improved health and wellness, many individuals have turned to intermittent fasting as an effective eating pattern to help manage weight, boost energy levels, and support various aspects of physical well-being. While the benefits of intermittent fasting are well-documented, one crucial element that often goes overlooked is the impact of this dietary approach on your sleep.

Quality sleep is vital for overall health, and understanding how to optimize your sleep patterns while practicing intermittent fasting can significantly improve your well-being.

This article explores how to sleep better while intermittent fasting and provides practical tips and strategies to help you achieve a more restful and rejuvenating slumber while embracing this popular dietary regimen. Say goodbye to sleepless nights and discover the keys to a harmonious balance between intermittent fasting and a good night’s sleep.

The Science Behind Intermittent Fasting And Improved Sleep Quality

Intermittent fasting, a time-honored practice, entails purposefully abstaining from calorie consumption for specific periods. Numerous individuals adopt an eating pattern from sunrise to sunset, covering early-morning meals and late-night snacks. This regimen restricts caloric intake during fasting, aligning predominantly with sleep. In the fed state following calorie intake, the body primarily utilizes glucose for energy rather than fat1.

The issue is that achieving high-quality sleep involves a shift toward burning fat for energy. So, if your body relies on glucose due to the fed state just before bedtime, it may not be optimally prepared for rest. The promising aspect is that the natural fat-burning condition during sleep aligns with the state during fasting, making intermittent fasting a viable solution. In recent years, this health practice has gained popularity as a weight loss and management method, improving health and enhancing sleep qualit12.

Here are some of the mechanisms and findings that have been explored:


Fasting triggers autophagy, which is the body’s way of cleaning out damaged cells and regenerating new ones. This process may positively impact the body temperature and overall health and could indirectly contribute to better sleep by reducing inflammation and improving cellular function3.

Weight Management

Some studies have suggested intermittent fasting can aid weight management and loss. Obesity and excess body weight are associated with sleep disturbances, and research suggests that losing weight through intermittent fasting may help improve sleep quality in individuals with weight-related sleep problems4.

Reduced Nighttime Acid Reflux

Eating close to bedtime can increase the risk of acid reflux, disrupting sleep. Intermittent fasting with a defined eating window may reduce the occurrence of acid reflux by avoiding late-night meals5.

Personalized Effects

The effects of intermittent fasting on sleep quality can vary among individuals. Some people report better sleep when practicing intermittent fasting, while others may experience disrupted sleep patterns. Personal factors, such as genetics, lifestyle, and individual response to fasting, can all influence how intermittent fasting practice affects sleep6. Additionally, the timing and duration of fasting periods and individual health conditions can influence the outcomes.

Before starting any fasting regimen, including intermittent fasting, it’s advisable to consult with a healthcare professional, especially if you have pre-existing health conditions. It’s crucial to ensure that any dietary changes are safe and suitable for your needs and health status.

How Are Intermittent Fasting And Sleeping Connected?

Everyone experiences sleep and fasting as a routine part of their daily lives, and these periods of rest and abstaining from food typically coincide. During both sleep and fasting, the body enters a unique metabolic state. This combination offers essential benefits, including a break for the brain, support for a healthier diet, body weight management, and enhanced digestive function. Additionally, incorporating intermittent fasting and proper sleep into your daily routine is crucial in maintaining a healthy metabolic function and ensuring synchronization with your body’s circadian rhythm7.

Humans possess an inherent circadian rhythm regulated by the natural 24-hour cycle of daylight and darkness, governing various processes such as energy production and hormone regulation. Essentially, circadian clocks are distributed throughout the body, and any disruption in their preferred patterns of “light equals activity” and “dark equals rest” can contribute to sleep disturbances, fatigue, and even more severe health issues like cardiovascular disease. Intermittent fasting serves as an additional cue that assists the body in aligning these internal clocks8.

Other several ways in which intermittent fasting and sleep are interconnected include:

Meal Timing

When you eat your last meal before bedtime can influence your sleep. Consuming a large, heavy meal close to bedtime may lead to indigestion and discomfort, which can interfere with your ability to fall asleep and stay asleep. Intermittent fasting can help you regulate meal timing by setting specific eating windows and fasting periods, which may prevent late-night overeating9.

Blood Sugar Levels

Intermittent fasting can help regulate blood sugar levels by reducing the frequency of insulin spikes and promoting insulin sensitivity. Stable blood sugar levels can lead to more consistent energy levels throughout all hours of the day and may reduce nighttime awakenings caused by blood sugar fluctuations10.

Hormone Regulation

Fasting can affect the release of various hormones, including melatonin and cortisol, which play a crucial role in sleep-wake patterns. Melatonin is the hormone that helps you fall asleep, and cortisol is the growth hormone responsible for wakefulness. The fasting timing and duration can impact these hormones’ balance11.

Energy Levels

Quality sleep and intermittent fasting can positively impact energy levels by promoting physical restoration during sleep and optimizing metabolic processes during fasting. Some people find that intermittent fasting can lead to increased alertness and energy during their fasting periods. This may help some individuals maintain focus and productivity during the day but could disrupt sleep if the fasting period is too close to bedtime. Finding a fasting schedule that works for your sleep needs12.


Dehydration can affect sleep quality, and fasting may sometimes lead to reduced water intake during fasting periods. It’s important to stay adequately hydrated, even during fasting, to ensure your sleep is not negatively impacted13.

Tips On How To Sleep Better While Intermittent Fasting

There are numerous ways to optimize your intermittent fasting routine to ensure you wake up refreshed and full of energy every day. Here are some additional steps you can take:

  • Choose the Right Fasting Window

Experiment with different fasting windows to find the one that works best for your sleep. Some people may find it beneficial to have their eating window earlier in the days of the week to ensure they have enough time to digest their last meal before bedtime14.

  • Stay Hydrated

Ensure you drink enough water during your fasting period to stay hydrated. Dehydration can affect sleep quality, so keep sipping water throughout the day to support various bodily functions and promote a restful night’s sleep15.

  • Monitor Caffeine Intake

Be mindful of caffeine consumption, as it can interfere with sleep. Limit caffeine intake, especially in the hours leading up to bedtime16.

  • Avoid Large Late-Night Meals

Large and heavy meals close to bedtime can lead to indigestion and discomfort, making it difficult to fall asleep. Try to have your last meal well before bedtime and opt for lighter, easily digestible foods.

  • Prioritize Nutrient-Dense Meals

When you eat, focus on nutrient-dense, balanced meals that provide the necessary vitamins and minerals for overall health, including sleep-promoting nutrients like magnesium17.

  • Pay Attention to Your Body

Listen to your body’s signals. If you find that your fasting or eating schedule negatively affects your sleep, be willing to adjust it to suit your needs better. It’s essential to prioritize sleep quality18.

  • Reduce Stress and Relax Before Bed

Engage in relaxation techniques before bedtime to reduce stress and prepare your body for sleep. Practices like meditation, deep breathing exercises, and gentle stretches can be helpful18.

  • Create a Sleep-Friendly Environment

Ensure your sleep environment is conducive to rest. Keep your bedroom dark, quiet, and at a comfortable temperature. Use blackout curtains, earplugs, or a white noise machine if necessary.

  • Establish a Consistent Sleep Schedule

Maintain a regular sleep schedule by going to bed and waking up simultaneously each day, even on weekends. Consistency in the sleep-wake cycle helps regulate your circadian rhythm.

  • Exercise Regularly

Engaging in regular physical activity can improve sleep quality. However, avoid vigorous exercise too close to bedtime, as it may be stimulating19.

  • Limit Screen Time Before Bed

Exposure to screens (phones, tablets, computers, TVs) emitting blue light can interfere with your body’s production of melatonin, a hormone that regulates sleep. Limit screen time in the hours leading up to bedtime20.

  • Seek Professional Guidance

If you continue to experience sleep disturbances while practicing intermittent fasting, or if you have preexisting sleep disorders, consult with a healthcare professional or a sleep specialist for personalized guidance and support.


The article delves into the intricate connection between intermittent fasting and sleep quality, centering on their influence on circadian rhythms, meal timing, blood sugar levels, hormone regulation, energy levels, and hydration, while considering individual variability.

Emphasizing the potential health advantages of syncing eating patterns with the body’s natural circadian rhythm and regulating sleep-related hormones, the article explores the scientific basis for the relationship. Topics covered include circadian rhythm alignment, hormone regulation, autophagy, blood sugar control, weight management, and addressing nighttime acid reflux.

Acknowledging the diverse responses to intermittent fasting, the article concludes by offering practical tips to optimize healthy sleep during intermittent fasting and encourages seeking professional guidance if needed.


1 Soliman GA. Intermittent fasting and time-restricted eating role in dietary interventions and precision nutrition. Front Public Health. 2022 Oct 28;10:1017254. doi: 10.3389/fpubh.2022.1017254. PMID: 36388372; PMCID: PMC9650338.

2 Sharma S, Kavuru M. Sleep and metabolism: an overview. Int J Endocrinol. 2010;2010:270832. doi: 10.1155/2010/270832. Epub 2010 Aug 2. PMID: 20811596; PMCID: PMC2929498.

3 Alirezaei M, Kemball CC, Flynn CT, Wood MR, Whitton JL, Kiosses WB. Short-term fasting induces profound neuronal autophagy. Autophagy. 2010 Aug;6(6):702-10. doi: 10.4161/auto.6.6.12376. Epub 2010 Aug 14. PMID: 20534972; PMCID: PMC3106288.

4 Garegnani L, Oltra G, Saldías C, Escobar Liquitay CM, Madrid E. Intermittent fasting for adults with overweight or obesity. Cochrane Database Syst Rev. 2023 Sep 8;2023(9):CD015610. doi: 10.1002/14651858.CD015610. PMCID: PMC10485895.

5 Vernia F, Di Ruscio M, Ciccone A, Viscido A, Frieri G, Stefanelli G, Latella G. Sleep disorders related to nutrition and digestive diseases: a neglected clinical condition. Int J Med Sci. 2021 Jan 1;18(3):593-603. doi: 10.7150/ijms.45512. PMID: 33437194; PMCID: PMC7797530.

6 Patterson, R. E., & Sears, D. D. (2017). Metabolic Effects of Intermittent Fasting. https://doi.org/10.1146/annurev-nutr-071816-064634

7 Patterson, R. E., Laughlin, G. A., Sears, D. D., LaCroix, A. Z., Marinac, C., Gallo, L. C., Hartman, S. J., Natarajan, L., Senger, C. M., Martínez, M. E., & Villaseñor, A. (2015). INTERMITTENT FASTING AND HUMAN METABOLIC HEALTH. Journal of the Academy of Nutrition and Dietetics, 115(8), 1203. https://doi.org/10.1016/j.jand.2015.02.018

8 Reddy S, Reddy V, Sharma S. Physiology, Circadian Rhythm. [Updated 2023 May 1]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK519507/

9 Boege, H. L., Bhatti, M. Z., & St-Onge, M. (2021). Circadian rhythms and meal timing: Impact on energy balance and body weight. Current Opinion in Biotechnology, 70, 1-6. https://doi.org/10.1016/j.copbio.2020.08.009

10 Yuan X, Wang J, Yang S, Gao M, Cao L, Li X, Hong D, Tian S, Sun C. Effect of Intermittent Fasting Diet on Glucose and Lipid Metabolism and Insulin Resistance in Patients with Impaired Glucose and Lipid Metabolism: A Systematic Review and Meta-Analysis. Int J Endocrinol. 2022 Mar 24;2022:6999907. doi: 10.1155/2022/6999907. PMID: 35371260; PMCID: PMC8970877.

11 Kim TW, Jeong JH, Hong SC. The impact of sleep and circadian disturbance on hormones and metabolism. Int J Endocrinol. 2015;2015:591729. doi: 10.1155/2015/591729. Epub 2015 Mar 11. PMID: 25861266; PMCID: PMC4377487.

12 Gudden J, Arias Vasquez A, Bloemendaal M. The Effects of Intermittent Fasting on Brain and Cognitive Function. Nutrients. 2021 Sep 10;13(9):3166. doi: 10.3390/nu13093166. PMID: 34579042; PMCID: PMC8470960.

13 Popkin, B. M., & Rosenberg, I. H. (2010). Water, Hydration and Health. Nutrition Reviews, 68(8), 439. https://doi.org/10.1111/j.1753-4887.2010.00304.x

14 Paoli A, Tinsley G, Bianco A, Moro T. The Influence of Meal Frequency and Timing on Health in Humans: The Role of Fasting. Nutrients. 2019 Mar 28;11(4):719. doi: 10.3390/nu11040719. PMID: 30925707; PMCID: PMC6520689.

15 Attinà A, Leggeri C, Paroni R, Pivari F, Dei Cas M, Mingione A, Dri M, Marchetti M, Di Renzo L. Fasting: How to Guide. Nutrients. 2021 May 7;13(5):1570. doi: 10.3390/nu13051570. PMID: 34067055; PMCID: PMC8151159.

16 O’Callaghan F, Muurlink O, Reid N. Effects of caffeine on sleep quality and daytime functioning. Risk Manag Healthc Policy. 2018 Dec 7;11:263-271. doi: 10.2147/RMHP.S156404. PMID: 30573997; PMCID: PMC6292246.

17 Tardy AL, Pouteau E, Marquez D, Yilmaz C, Scholey A. Vitamins and Minerals for Energy, Fatigue and Cognition: A Narrative Review of the Biochemical and Clinical Evidence. Nutrients. 2020 Jan 16;12(1):228. doi: 10.3390/nu12010228. PMID: 31963141; PMCID: PMC7019700.

18 Leonidis A, Korozi M, Sykianaki E, Tsolakou E, Kouroumalis V, Ioannidi D, Stavridakis A, Antona M, Stephanidis C. Improving Stress Management and Sleep Hygiene in Intelligent Homes. Sensors (Basel). 2021 Mar 30;21(7):2398. doi: 10.3390/s21072398. PMID: 33808468; PMCID: PMC8036360.

19 Dolezal BA, Neufeld EV, Boland DM, Martin JL, Cooper CB. Interrelationship between Sleep and Exercise: A Systematic Review. Adv Prev Med. 2017;2017:1364387. doi: 10.1155/2017/1364387. Epub 2017 Mar 26. Erratum in: Adv Prev Med. 2017;2017:5979510. PMID: 28458924; PMCID: PMC5385214.

20 Hale L, Kirschen GW, LeBourgeois MK, Gradisar M, Garrison MM, Montgomery-Downs H, Kirschen H, McHale SM, Chang AM, Buxton OM. Youth Screen Media Habits and Sleep: Sleep-Friendly Screen Behavior Recommendations for Clinicians, Educators, and Parents. Child Adolesc Psychiatr Clin N Am. 2018 Apr;27(2):229-245. doi: 10.1016/j.chc.2017.11.014. PMID: 29502749; PMCID: PMC5839336.


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