Scientific Sources

QualitySleep bases its editorial content on peer-reviewed research, clinical guidelines, and established sources in sleep medicine. This page lists the primary scientific references used across the site, grouped by topic.

For a full explanation of how we evaluate and apply research, see our Research Methodology page.

Sleep architecture and physiology

• Walker, M. (2017). Why We Sleep: Unlocking the Power of Sleep and Dreams. Scribner.
• Carskadon, M. A., & Dement, W. C. (2011). Normal human sleep: An overview. In Kryger, M. H., Roth, T., & Dement, W. C. (Eds.), Principles and Practice of Sleep Medicine (5th ed., pp. 16–26). Elsevier Saunders.
• Xie, L., et al. (2013). Sleep drives metabolite clearance from the adult brain. Science, 342(6156), 373–377. https://doi.org/10.1126/science.1241224
• Saper, C. B., Scammell, T. E., & Lu, J. (2005). Hypothalamic regulation of sleep and circadian rhythms. Nature, 437(7063), 1257–1263. https://doi.org/10.1038/nature04284

Circadian rhythm and light exposure

• Lewy, A. J., et al. (1980). Light suppresses melatonin secretion in humans. Science, 210(4475), 1267–1269. https://doi.org/10.1126/science.7434030
• Gooley, J. J., et al. (2011). Exposure to room light before bedtime suppresses melatonin onset and shortens melatonin duration in humans. Journal of Clinical Endocrinology & Metabolism, 96(3), E463–E472. https://doi.org/10.1210/jc.2010-2098
• Czeisler, C. A., et al. (1999). Stability, precision, and near-24-hour period of the human circadian pacemaker. Science, 284(5423), 2177–2181. https://doi.org/10.1126/science.284.5423.2177

Mouth taping and nasal breathing

• Lee, S. H., et al. (2022). Effectiveness of mouth taping on snoring in mouth-breathing adult subjects: A prospective pilot study. Healthcare, 10(9), 1661. https://doi.org/10.3390/healthcare10091661
• Suratt, P. M., et al. (1988). Effect of nasal obstruction on breathing during sleep. Chest, 93(2), 442–447. https://doi.org/10.1378/chest.93.2.442
• Rappai, M., et al. (2003). The nose and sleep-disordered breathing. Chest, 124(6), 2309–2323. https://doi.org/10.1378/chest.124.6.2309

Sleep environment — noise and sound

• Halperin, D. (2014). Environmental noise and sleep disturbances: A threat to health? Sleep Science, 7(4), 209–212. https://doi.org/10.1016/j.slsci.2014.11.003
• Stanchina, M. L., et al. (2005). The influence of white noise on sleep in subjects exposed to ICU noise. Sleep Medicine, 6(5), 423–428. https://doi.org/10.1016/j.sleep.2004.12.004
• Messineo, L., et al. (2017). Broadband sound administration improves sleep onset latency in healthy subjects in a model of transient insomnia. Frontiers in Neurology, 8. https://doi.org/10.3389/fneur.2017.00718

Sleep environment — temperature

• Raymann, R. J. E. M., Swaab, D. F., & Van Someren, E. J. W. (2008). Skin deep: Enhanced sleep depth by cutaneous temperature manipulation. Brain, 131(2), 500–513. https://doi.org/10.1093/brain/awm315
• Okamoto-Mizuno, K., & Mizuno, K. (2012). Effects of thermal environment on sleep and circadian rhythm. Journal of Physiological Anthropology, 31(1), 14. https://doi.org/10.1186/1880-6805-31-14

Sleep environment — light and darkness

• Obayashi, K., et al. (2013). Exposure to light at night, nocturnal urinary melatonin excretion, and obesity/dyslipidemia in the elderly. Journal of Clinical Endocrinology & Metabolism, 98(1), 337–344. https://doi.org/10.1210/jc.2012-2874
• Cho, Y., et al. (2015). Effects of artificial light at night on human health. Chronobiology International, 32(9), 1294–1310.

Melatonin

• Brzezinski, A., et al. (2005). Effects of exogenous melatonin on sleep: A meta-analysis. Sleep Medicine Reviews, 9(1), 41–50. https://doi.org/10.1016/j.smrv.2004.06.004
• Ferracioli-Oda, E., Qawasmi, A., & Bloch, M. H. (2013). Meta-analysis: Melatonin for the treatment of primary sleep disorders. PLoS ONE, 8(5), e63773. https://doi.org/10.1371/journal.pone.0063773

Nighttime routines and sleep onset

• Scullin, M. K., et al. (2018). The effects of bedtime writing on difficulty falling asleep: A polysomnographic study comparing to-do lists and completed activity lists. Experimental Psychology, 65(1), 13–22. https://doi.org/10.1027/1618-3169/a000368
• Harvey, A. G. (2002). A cognitive model of insomnia. Behaviour Research and Therapy, 40(8), 869–893.

Clinical guidelines

• American Academy of Sleep Medicine (AASM) — clinical practice guidelines and sleep health standards. aasm.org
• National Sleep Foundation — sleep recommendations and public education. sleepfoundation.org
• Centers for Disease Control and Prevention (CDC) — sleep and sleep disorders. cdc.gov/sleep
• World Health Organization (WHO) — noise pollution and health outcome guidance.

Last updated: June 2026. This list is updated periodically as new research is incorporated into site content.