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melatonin
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Extent and Health Consequences of Chronic Sleep Loss and ... - NCBI ncbi.nlm.nih.gov 12 facts
claimBeta-blocking agents may disrupt sleep by depleting melatonin, which is an important sleep-related hormone.
claimDawson D and Encel N studied the effects of melatonin on sleep in humans.
referenceVan Den Heuvel CJ, Reid KJ, and Dawson D studied the effect of atenolol on nocturnal sleep and temperature in young men and found that pharmacological doses of melatonin reversed these effects, as published in Physiology and Behavior in 1997.
referenceVaziri ND et al. investigated serum melatonin and 6-sulfatoxymelatonin levels in end-stage renal disease patients and the effect of hemodialysis, as published in Artificial Organs in 1993.
referenceNonsteroidal anti-inflammatory drugs (NSAIDs) alter body temperature and suppress melatonin in humans.
referenceNonsteroidal anti-inflammatory agents affect sleep by decreasing the production of sleep-promoting prostaglandins, suppressing the normal surge of melatonin, and altering the daily rhythm of body temperature (Murphy et al., 1994, 1996).
claimLewy AJ, Ahmed S, and Sack RL demonstrated that melatonin can be used to phase shift the human circadian clock in a 1996 study published in Behavioural Brain Research.
claimIt is hypothesized that administration of low levels of melatonin in the early morning may be used to treat advanced sleep phase syndrome, though there are no published reports verifying this option.
referenceHemodialysis-associated changes in melatonin secretion patterns and alterations in body temperature rhythms may disrupt circadian systems (Vaziri et al., 1993, 1996; Parker et al., 2000; Parker, 2003).
procedureTreatment for delayed sleep phase syndrome requires resynchronizing to a more appropriate phase to the 24-hour light-dark cycle, which may include a structured sleep-wake schedule, good sleep hygiene practices, and resetting the circadian pacemaker with bright light, melatonin, or a combination of both.
claimThere have been no large-scale controlled studies examining the efficacy of melatonin for treating delayed sleep phase syndrome, and it has not been approved by the Food and Drug Administration for this indication.
claimIndividuals with delayed sleep phase syndrome exhibit a hypersensitivity to nighttime bright light exposure regarding the suppression of melatonin, despite the typical increase of melatonin levels in the evening hours.
Seasonal Changes of Serum Gonadotropins and Testosterone in ... frontiersin.org Jan 9, 2020 5 facts
referenceLuboshitzky et al. (2000) found that long-term melatonin administration does not alter pituitary-gonadal hormone secretion in normal men.
referencePatients with gonadotropin-releasing hormone deficiency exhibit pulsatile patterns of melatonin secretion, which are affected by testosterone treatment, according to a 1997 study by Luboshitzky et al.
referenceMartikainen et al. (1985) studied circannual concentrations of melatonin, gonadotrophins, prolactin, and gonadal steroids in males living in a geographical area with large annual variations in daylight.
claimIn the study, the authors found no influence of daylight duration on luteinizing hormone (LH) secretion, suggesting a mechanism independent from melatonin.
claimA relationship between testosterone and melatonin secretion has been suggested in scientific literature.
The lunar cycle: effects on human and animal behavior and physiology pubmed.ncbi.nlm.nih.gov 4 facts
claimIn birds, daily variations in melatonin and corticosterone disappear during full-moon days.
claimMelatonin and endogenous steroids may mediate cyclic alterations of physiological processes in organisms.
claimMelatonin levels appear to correlate with the menstrual cycle in humans.
claimMelatonin and endogenous steroids may mediate cyclic alterations of physiological processes in response to the lunar cycle.
Why Sleep Is Important for Brain Health - American Brain Foundation americanbrainfoundation.org Mar 16, 2022 4 facts
claimIndividuals can use light exposure and melatonin to shift their circadian clock to accommodate work or social obligations.
claimNatural melatonin levels decrease as humans age.
measurementHigh doses of melatonin can affect the vascular system, so individuals should stick to doses between 0.5 milligrams and 3 milligrams unless a doctor recommends otherwise.
claimMelatonin promotes sleep by decreasing the arousal or alerting signal from the circadian clock.
Short- and long-term health consequences of sleep disruption dovepress.com May 19, 2017 3 facts
claimExposure to light at night decreases the production of melatonin, which may lead to increased production of reproductive hormones.
claimMelatonin possesses properties including DNA repair, inhibition of tumor growth, and acting as a potent free-radical scavenger.
claimThe suprachiasmatic nucleus (SCN) signals the pineal gland to control the secretion of melatonin, a neurohormone that synchronizes circadian rhythms with the environment and the body via melatonin receptors in nearly all tissues.
Sleep Your Way to a Smarter Brain | American Heart Association heart.org Jan 25, 2024 2 facts
procedureReliance on sleep aids, including melatonin supplements, should be minimized because they can be addictive and are intended for short-term use, requiring the user to eventually wean off them.
procedureBright light from electronic devices like lamps, TVs, and cell phones suppresses the release of melatonin, a hormone that helps the body fall asleep; therefore, these devices should be turned off to allow melatonin to rise naturally.
How Men's Hormones Change with Age - London Andrology londonandrology.com 2 facts
How much sleep do you actually need? - Harvard Health health.harvard.edu Oct 30, 2023 2 facts
Experts recommend 7-8 hours of sleep for better brain health sph.unc.edu Jan 31, 2017 2 facts
Understanding the Difference Between Men & Women Hormones prestonspharmacy.com Jan 13, 2026 1 fact
procedureLifestyle changes to balance hormones include eating a diet of whole foods rich in nutrients, healthy fats, and lean protein; engaging in regular physical activity to regulate insulin and cortisol; practicing stress management techniques like yoga, meditation, or deep breathing to reduce cortisol; and obtaining quality sleep to support the regulation of melatonin and growth hormone.
Lunar effect - Wikipedia en.wikipedia.org 1 fact
claimIn orange-spotted spinefoot fish, lunar phases affect the levels of melatonin in the blood.
Different levels of circadian (de)synchrony – where does it hurt?. f1000research.com 1 fact
referenceZeitzer JM, Dijk DJ, Kronauer R, et al. published 'Sensitivity of the human circadian pacemaker to nocturnal light: melatonin phase resetting and suppression' in J. Physiol. in 2000, volume 526, part 3, pages 695–702.
Why Is Sleep Important for Our Mental and Physical Health? insightspsychology.org Oct 29, 2024 1 fact
claimExposure to screens, such as phones and televisions, should be avoided at least 30 minutes before bed because blue light disrupts melatonin production.
Which hormones are present in men + women? - MITOcare mitocare.de 1 fact
claimMelatonin is a hormone that regulates the body's sleep-wake cycle and induces feelings of tiredness in the evening.