Sleep
Medical Studies on Melatonin – Sleep
Modern science recognises more than 100 diseases related to sleep, because sleep disorders that are left undiagnosed or untreated can result in drastic consequences for health. Experts estimate that roughly one in ten suffers from some kind of sleep disorder. This proportion is even higher among older people, with around 60 to 70 per cent of people over the age of 65 suffering from sleep disorders to differing extents. A sleep disorder is defined as such if a person sleeps for less than six hours a night in three out of seven nights over a period of six months.
Sleep deprivation and its health consequences
Studies have been finding for years that people who sleep too little or have to sleep at the wrong times, for example, suffer from flu-like infections four times as often, as their immune system is weakened as a result of the sleep deprivation. People who have been working shifts for more than 10 years are at particular risk; the WHO (World Health Organisation) has classified night shift work as carcinogenic. The risk of breast cancer can increase by up to 65 per cent, while the risk of intestinal and prostate cancer also rises drastically.
Other effects
The likelihood of digestive system disorders, heart attack, stroke, diabetes, vascular diseases, and also cancer, dementia and obesity is also increased many times over. A lack of sleep can also result in impaired memory, lack of drive and mood swings. In the worst cases, this may result in hallucinations or depression.
Melatonin as a key hormone
The benefits of melatonin in regulating and optimising the sleep/wake cycle have long been proven. Especially as a chronotherapeutic drug, its value has been very successfully proven, providing support in mitigating the risk of one of the aforementioned diseases. And it has also been demonstrated that melatonin is highly tolerable over a longer period time, even at higher dosages. There is also no risk of addiction and/or dependency.
Medical Studies on Melatonin – Sleep
2020-01-04
The effects of sleep duration on semen quality have been documented in many epidemiological studies. However, the association between sleep quality and semen parameters and reproductive hormones is still unclear.
2020-01-03
Poor sleep associates with mental and cardiometabolic pathological outcomes. The participation of sleep timing features in the pathways by which this relationship occurs is not clear.
2019-12-13
In depression, symptoms range from loss of motivation and energy to suicidal thoughts. Moreover, in depression alterations might be also observed in the sleep-wake cycle and in the daily rhythms of hormonal (e.g., cortisol, melatonin) secretion.
2019-11-16
Adjuvant chemotherapy for breast cancer (ACBC) has been associated with fatigue, pain, depressive symptoms, and disturbed sleep. And, previous studies in non-cancer patients showed that melatonin could improve the descending pain modulatory system (DPMS).
2019-11-14
Several novel animal studies have shown that intrauterine metabolic programming can be modified in the event of reduced melatonin synthesis during pregnancy, leading to glucose intolerance and insulin resistance in the offspring. It is therefore postulated that female night workers when pregnant may expose the offspring to unwanted health threats.
2019-10-03
Studies on circadian timing in depression have produced variable results, with some investigations suggesting phase advances and others phase delays. This variability may be attributable to differences in participant diagnosis, medication use, and methodology between studies.
2019-10-03
Sleep disorders increase in prevalence during the menopausal transition and they constitute a complex phenomenon. Insomnia, the main sleep disorder, can be a primary disorder or it can be secondary to hot flushes (HF), mood disorders, psychosocial factors, medical conditions, and other sleep disturbances, such as obstructive sleep apnoea (OSA) or restless legs syndrome (RLS).
2019-09-13
Women experience increased vulnerability for both mood and sleep disorders, and the female menstrual cycle represents one fundamental mechanism related to risk.
2019-09-02
Humans live in a 24-hour environment, in which light and darkness follow a diurnal pattern. Our circadian pacemaker, the suprachiasmatic nuclei (SCN) in the hypothalamus, is entrained to the 24-hour solar day via a pathway from the retina and synchronises our internal biological rhythms.
2019-08-26
The Metabolic Syndrome is a cluster of cardio-metabolic risk factors and comorbidities conveying high risk of both cardiovascular disease and type 2 diabetes. It is responsible for huge socio-economic costs with its resulting morbidity and mortality in most countries. The underlying aetiology of this clustering has been the subject of much debate.
2019-08-02
Healthy circadian rhythmicity has been suggested to relate to a better state of brain-injured patients and to support the emergence of consciousness in patient groups characterized by a relative instability thereof such as patients with disorders of consciousness (DOC).
2019-07-26
Patients with major depressive disorder (MDD) often have circadian rhythm alteration and sleep disturbance. The pineal gland regulates the circadian rhythm and sleep by the secretion of melatonin neurohormone. However, the relationship between pineal abnormality and MDD remains elusive.
2019-07-16
Our purpose is to investigate the impact of circadian and melatonin pathway genes as well as their interactions with night-shift work (NSW) on breast cancer risk in Korean women.
2019-07-01
Last year melatonin was 60 years old, or at least its discovery was 60 years ago. The molecule itself may well be almost as old as life itself. So it is time to take yet another perspective on our understanding of its functions, effects and clinical uses.
2019-06-26
Circadian rhythms (CR) are a series of endogenous autonomous oscillators generated by the molecular circadian clock which acting on coordinating internal time with the external environment in a 24-h daily cycle.
2019-06-15
The purpose of this review is to provide a brief summary about the current state of knowledge regarding the circadian rhythm in the regulation of normal renal function.
2019-06-13
Daily rhythms generated by endogenous circadian mechanisms and synchronized to the light-dark cycle have been implicated in the timing of birth in a wide variety of species. Although chronodisruption (e.g., shift work or clock gene mutations) is associated with poor reproductive outcomes, little is known about circadian timing during pregnancy.
2019-06-11
Molecular circadian clocks align daily behavioral and metabolic rhythms with the external day-night cycle. Priming energy metabolism for recurring changes on a 24-hour basis, these clocks are deeply interlinked with metabolic homeostasis and health.
2019-06-03
Melatonin (MLT), a neuromodulator mainly acting through two G-protein coupled receptors MT1 and MT2, regulates many brain functions, including circadian rhythms, mood, pain and sleep. MLT and non-selective MT1/MT2 receptor agonists are clinically used in neuropsychiatric and/or sleep disorders.
2019-05-06
Sleep inertia, broadly defined as decrements in performance and lowering of alertness following waking, lasts for durations ranging between 1 min and 3 hrs. This study investigated whether, compared to a dim light condition (the control), exposure to long-wavelength (red) light delivered to closed eyelids during sleep (red light mask) and to eyes open upon waking (red light goggles) reduced sleep inertia.