Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Altered cortisol levels in relation to Ramadan.

M S al-Hadramy1, T H Zawawi, S M Abdelwahab

  • 1Department of Medicine, Abdulaziz University Hospital, Jeddah, Saudi Arabia.

European Journal of Clinical Nutrition
|April 1, 1988
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

E-beam irradiation-induced synthesis of hydroxyethyl cellulose/(Cu<sub>2</sub>O-rGO)/BiVO<sub>4</sub>-based nanocomposite for photocatalytic remediation of wastewater under visible light.

International journal of biological macromolecules·2023
Same author

<i>TNFSF15</i> (rs3810936) in Behçet's disease.

British journal of biomedical science·2020
Same author

Subclinical diabetic neuropathy. A common complication in Saudi diabetics.

Neurosciences (Riyadh, Saudi Arabia)·2013
Same author

Subclinical diabetic neuropathy: a common complication in Saudi diabetics.

Saudi medical journal·2001
Same author

Circadian rhythm of granulocyte-macrophage colony-stimulating factor in normal subjects and neutropenic hospitalised patients.

Irish journal of medical science·2000
Same author

Wet vs. dry chemical analysis of renal stones.

Irish journal of medical science·1999
Same journal

Association between nutrition knowledge and Mediterranean diet adherence in Israeli adults with type 2 diabetes.

European journal of clinical nutrition·2026
Same journal

Evaluation of a context-specific diet diversity score (DDS) for predicting micronutrient adequacy in 6-10-year-old rural Indian children.

European journal of clinical nutrition·2026
Same journal

Beyond reliability: Addressing systematic bias and advancing standardization in bioelectrical impedance analysis.

European journal of clinical nutrition·2026
Same journal

Efficacy and safety of hydrolyzed collagen supplementation on skin health outcomes: a systematic literature review of randomized controlled trials.

European journal of clinical nutrition·2026
Same journal

Fermented foods and inflammation: a crossover intervention trial with fresh and pasteurized sauerkraut.

European journal of clinical nutrition·2026
Same journal

Comparative machine learning modeling of resting energy expenditure estimation in mechanically ventilated children after cardiac surgery.

European journal of clinical nutrition·2026
See all related articles

Ramadan fasting alters sleep patterns, affecting cortisol rhythms in healthy adults. Morning cortisol normalized post-Ramadan, but elevated midnight levels persisted in some, suggesting potential misinterpretation of single cortisol measurements.

Area of Science:

  • Endocrinology
  • Chronobiology
  • Sleep Medicine

Background:

  • Ramadan fasting involves significant alterations in daily routines, including sleep-wake cycles.
  • Disruptions in circadian rhythms, such as sleep patterns, can impact hormonal profiles, including cortisol levels.

Purpose of the Study:

  • To investigate the impact of altered sleep patterns during Ramadan on morning and midnight cortisol levels in healthy adults.
  • To assess the reversibility of cortisol rhythm changes after the fasting period.

Main Methods:

  • 10 healthy adults monitored cortisol levels at home during Ramadan.
  • 24-hour cortisol profiling was conducted on one participant.
  • Cortisol levels were re-evaluated 4 weeks after Ramadan.

Related Experiment Videos

Main Results:

  • Four participants exhibited altered cortisol rhythms during the latter half of Ramadan, with some showing a reversed morning/midnight ratio.
  • A significant forward shift in the cortisol acrophase and nadir was observed in one participant, correlating with sleep pattern changes.
  • Morning cortisol levels normalized for all subjects 4 weeks post-Ramadan.
  • Elevated midnight cortisol levels (>250 nmol/l) persisted in three participants who showed rhythm alterations during Ramadan.

Conclusions:

  • Altered sleep during Ramadan can significantly disrupt the diurnal cortisol rhythm.
  • Single cortisol measurements taken during or shortly after Ramadan may be misleading in clinical settings.
  • Persistent elevated midnight cortisol levels warrant further investigation regarding long-term health implications.