Sleep
19 articles carry this tag. Tags group articles across topics; each article still sits under one topic in the contents.
- Sleep physiology · The biological systems that regulate when sleep occurs, the stages of a night of sleep, and the links between sleep duration, disease and risk of death.
- Insomnia · Insomnia is persistent difficulty falling or staying asleep with daytime impairment; this covers its causes, prevalence, treatment and links to health.
- Sleep duration and mortality · How habitual sleep length, sleep regularity and sleep disorders relate to the risk of death in long-term population studies.
- Sleep quality · Sleep quality describes how well a person sleeps, including how quickly they fall asleep, how often they wake and how rested they feel.
- Naps · A nap is a short sleep taken during the daytime; short naps improve alertness, while regular naps of an hour or more are linked to a higher risk of death.
- Meal timing · Meal timing is the clock time and daily regularity of eating; very late and irregular meals are linked to higher cardiovascular and mortality risk.
- Coffee, tea and energy drinks · Coffee, tea and energy drinks are the main sources of caffeine; coffee and tea are linked to lower death rates, energy drinks to short-term heart effects.
- Alcohol · Alcohol (ethanol) is a widely used sedative drug whose health risks rise with the amount drunk, including cancer, heart disease, liver disease and injury.
- Cognitive aging · Cognitive aging is the gradual change in memory, reasoning and speed of thinking with age, measurable from midlife and linked to health and lifestyle.
- Skin aging · Skin aging is the gradual loss of skin structure and elasticity, driven by age and genes and accelerated mainly by sunlight and smoking.
- Road safety · Road safety covers the causes and prevention of deaths and injuries in road traffic crashes, including driver behaviour, protective equipment and vehicle design.
- Melatonin · Melatonin is a hormone made by the pineal gland (a small gland deep in the brain) at night; as a supplement it is studied mainly for shifting the timing of sleep, for jet lag and for insomnia.
- Magnesium · Magnesium is an essential dietary mineral; as a supplement it is studied for insomnia, mainly in older adults.
- Glycine · Glycine is an amino acid (a building block of protein) and an inhibitory neurotransmitter (a chemical messenger that calms nerve activity); as a supplement it is studied for sleep quality when taken as a single dose before bed.
- L-theanine · L-theanine is an amino acid (a building block of protein) found in tea leaves; as a supplement it is studied for stress, relaxation and self-reported sleep quality.
- Ashwagandha · Ashwagandha (Withania somnifera) is a plant used in Ayurvedic (traditional Indian) medicine; extracts of it are studied for stress, anxiety and sleep quality.
- GABA · Gamma-aminobutyric acid (GABA) is the main inhibitory neurotransmitter of the brain (the chemical messenger that most dampens nerve activity); as an oral supplement it is studied for stress and sleep.
- Apigenin · Apigenin is a flavonoid (a type of plant compound) found in chamomile flowers; it is studied as the compound thought to underlie the traditional use of chamomile tea as a sedative.
- Valerian · Valerian is a flowering plant whose root extract has a long history as a sleep remedy; it is studied for sleep quality and insomnia.