References & Endnotes
Key sources behind this guide — linked directly to the source where available
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Walker MP, Stickgold R. "Sleep, Memory, and Plasticity." Annual Review of Psychology, 2006;57:139-166. View study ↗ ↩ back to text
Irwin MR. "Sleep and Inflammation: Partners in Sickness and in Health." Nature Reviews Immunology, 2019;19:702-715. View study ↗ ↩ back to text
Prather AA, Janicki-Deverts D, Hall MH, Cohen S. "Behaviorally Assessed Sleep and Susceptibility to the Common Cold." Sleep, 2015;38(9):1353-1359. View study ↗ ↩ back to text
Spiegel K, Tasali E, Penev P, Van Cauter E. "Brief Communication: Sleep Curtailment in Healthy Young Men Is Associated with Decreased Leptin Levels, Elevated Ghrelin Levels, and Increased Hunger and Appetite." Annals of Internal Medicine, 2004;141(11):846-850. View study ↗ ↩ back to text
Yoo SS, Gujar N, Hu P, Jolesz FA, Walker MP. "The Human Emotional Brain Without Sleep — a Prefrontal Amygdala Disconnect." Current Biology, 2007;17(20):R877-R878. ↩ back to text
Ohayon MM, Carskadon MA, Guilleminault C, Vitiello MV. "Meta-Analysis of Quantitative Sleep Parameters From Childhood to Old Age in Healthy Individuals: Developing Normative Sleep Values Across the Human Lifespan." Sleep, 2004;27(7):1255-1273. View study ↗ ↩ back to text
Czeisler CA, Duffy JF, Shanahan TL, et al. "Stability, Precision, and Near-24-Hour Period of the Human Circadian Pacemaker." Science, 1999;284(5423):2177-2181. View study ↗ ↩ back to text
Patke A, Murphy PJ, Onat OE, et al. "Mutation of the Human Circadian Clock Gene CRY1 in Familial Delayed Sleep Phase Disorder." Cell, 2017;169(2):203-215. View study ↗ ↩ back to text
Burke TM, Markwald RR, McHill AW, et al. "Effects of Caffeine on the Human Circadian Clock In Vivo and In Vitro." Science Translational Medicine, 2015;7(305):305ra146. View study ↗ ↩ back to text
Van Dongen HPA, Maislin G, Mullington JM, Dinges DF. "The Cumulative Cost of Additional Wakefulness: Dose-Response Effects on Neurobehavioral Functions and Sleep Physiology From Chronic Sleep Restriction and Total Sleep Deprivation." Sleep, 2003;26(2):117-126. View study ↗ ↩ back to text
Cappuccio FP, D'Elia L, Strazzullo P, Miller MA. "Sleep Duration and All-Cause Mortality: A Systematic Review and Meta-Analysis of Prospective Studies." Sleep, 2010;33(5):585-592. View study ↗ ↩ back to text
Hirshkowitz M, Whiton K, Albert SM, et al. "National Sleep Foundation's Sleep Time Duration Recommendations: Methodology and Results Summary." Sleep Health, 2015;1(1):40-43. View study ↗ ↩ back to text
Riemann D, Baglioni C, Bassetti C, et al. "European Guideline for the Diagnosis and Treatment of Insomnia." Journal of Sleep Research, 2017;26(6):675-700. View study ↗ ↩ back to text
Trauer JM, Qian MY, Doyle JS, Rajaratnam SMW, Cunnington D. "Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-Analysis." Annals of Internal Medicine, 2015;163(3):191-204. View study ↗ ↩ back to text
Benjafield AV, Ayas NT, Eastwood PR, et al. "Estimation of the Global Prevalence and Burden of Obstructive Sleep Apnoea: A Literature-Based Analysis." The Lancet Respiratory Medicine, 2019;7(8):687-698. View study ↗ ↩ back to text
Ebrahim IO, Shapiro CM, Williams AJ, Fenwick PB. "Alcohol and Sleep I: Effects on Normal Sleep." Alcoholism: Clinical and Experimental Research, 2013;37(4):539-549. View study ↗ ↩ back to text
Kredlow MA, Capozzoli MC, Hearon BA, Calkins AW, Otto MW. "The Effects of Physical Activity on Sleep: A Meta-Analytic Review." Journal of Behavioral Medicine, 2015;38(3):427-449. View study ↗ ↩ back to text
Chang AM, Aeschbach D, Duffy JF, Czeisler CA. "Evening Use of Light-Emitting eReaders Negatively Affects Sleep, Circadian Timing, and Next-Morning Alertness." Proceedings of the National Academy of Sciences, 2015;112(4):1232-1237. View study ↗ ↩ back to text
Spiegel K, Sheridan JF, Van Cauter E. "Effect of Sleep Deprivation on Response to Immunization." JAMA, 2002;288(12):1471-1472. View study ↗ ↩ back to text
Ferracioli-Oda E, Qawasmi A, Bloch MH. "Meta-Analysis: Melatonin for the Treatment of Primary Sleep Disorders." PLOS ONE, 2013;8(5):e63773. View study ↗ ↩ back to text
Abbasi B, Kimiagar M, Sadeghniiat K, Shirazi MM, Hedayati M, Rashidkhani B. "The Effect of Magnesium Supplementation on Primary Insomnia in Elderly: A Double-Blind Placebo-Controlled Clinical Trial." Journal of Research in Medical Sciences, 2012;17(12):1161-1169. View study ↗ ↩ back to text
Bulman A, et al. "The Effects of L-Theanine Consumption on Sleep Outcomes: A Systematic Review and Meta-Analysis." Sleep Medicine Reviews, 2025. View study ↗ ↩ back to text
Zick SM, Wright BD, Sen A, Arnedt JT. "Preliminary Examination of the Efficacy and Safety of a Standardized Chamomile Extract for Chronic Primary Insomnia: A Randomized Placebo-Controlled Pilot Study." BMC Complementary and Alternative Medicine, 2011;11:78. View study ↗ ↩ back to text