Quality & disorders

A man seen from behind sits on the edge of a bed facing a bright, curtained window in a dim bedroom.

CPAP use linked to lower depression risk in sleep apnea, 19% vs 24% over eight years

Oct 20, 2026

A pregnant person lying on a bed in a ribbed dress, one hand resting on the belly and an open book in front, face out of frame.

Maternal sleep disorders linked to child developmental disorders in nearly 2 million Korean births

Oct 16, 2026

A dark bedroom at night with a person standing in silhouette by a lit doorway and an unmade bed in the foreground.

Insomnia plus sleep apnea linked to 78% higher heart attack and stroke risk in 1,860 Swiss adults

Oct 16, 2026

An open laptop glows on an unmade bed in a bedroom lit dim red, with a desk lamp on a chest of drawers beside it.

Users of online insomnia program SHUTi reported better sleep in 25 studies, in a review led by its developers

Oct 14, 2026

A glass of water and blister packs of tablets sit on a black tray, with an older man and woman blurred on a bed behind.

Lemborexant linked to fewer hip fractures than Z-drugs in older adults, though the estimate is uncertain

Oct 14, 2026

A hand rests on rumpled pale bedding beside a pillow.

Cannabis use linked to more broken sleep on wrist monitors in a 35-year study, but not to self-rated sleep

Oct 12, 2026

A person in white pajamas sitting on a bed and holding a smartphone, face not shown.

Digital CBT was the only digital insomnia therapy to show a meaningful benefit in an analysis of 96 trials

Oct 4, 2026

A runner on a snow-covered path at dusk, with a lit street lamp and apartment buildings behind.

Evening exercise and sleep: what trials show, and when a late hard workout may cost rest

Oct 2, 2026

A person sitting at a computer in a dark room lit by green and blue light.

Night owls were 1.7 times as likely to retire early on a disability pension in a 12-year Finnish study

Oct 2, 2026

Two cut-glass tumblers of amber spirit on a dark surface.

Alcohol and sleep: why a nightcap helps people nod off and what it does to the rest of the night

Oct 1, 2026

A mug of dark drink beside a lit tablet, a small lamp and a pair of glasses on a wooden table at night.

Caffeine and sleep: how much sleep coffee costs, how long the effect lasts and why people differ

Oct 1, 2026

An older woman with white hair sitting up in bed with hands clasped, while a second person sits in shadow in the foreground.

Insomnia and anxiety together were linked to 54% higher dementia risk in a UK Biobank study

Oct 1, 2026

A person with short dark hair, seen from behind, looking at an abstract blue painting on a white gallery wall.

Sleep loss made paintings look less beautiful to 68 young adults in a lab experiment

Oct 1, 2026

A person tapping a smartwatch with a blank screen worn on the wrist.

Sleep trackers: how accurate they are, what they miss and what sleep doctors say about them

Oct 1, 2026

A person in glasses lying on a pillow at night and looking at a phone, with city lights blurred behind.

TikTok insomnia advice was high quality in only 20 of 127 videos that sleep doctors reviewed

Oct 1, 2026

A pair of glasses lying on a keyboard lit in blue.

Do blue-light glasses work? What the research shows

Sep 29, 2026

A man asleep with his head resting on a soft pillow.

GLP-1 drugs did not lower new sleep apnea diagnoses in 47,315 people with type 2 diabetes

Sep 29, 2026

A person asleep in bed behind a black alarm clock.

How much sleep do adults need? What the research and guidelines say

Sep 29, 2026

An older woman in glasses lying in bed reading a book.

Orexin-blocking insomnia drugs were not linked to more falls or fractures across 19 studies

Sep 29, 2026

A young woman asleep under a white blanket with her head on a white pillow.

Sound pulses timed to deep sleep improved memory in a 20-person study

Sep 29, 2026

A person sitting up in bed at night in pajamas, head resting in their hands.

Night sweats, more than hot flashes, went with poor sleep and low energy in 841 midlife women

Sep 26, 2026

An unmade bed beside a large window looking out on lit city buildings

Light at night went with a thicker, stiffer heart, in 11,071 UK Biobank adults with heart scans

Sep 23, 2026

Bright daylight streaming through sheer curtains onto the corner of a bed beside a dark chair

Sleep therapy eased insomnia during breast cancer chemotherapy but light glasses did not, in 219 women

Sep 22, 2026

A young woman asleep with head resting on one arm beside a glass of water

Narcolepsy pill that stands in for the brain's missing wake signal kept people awake, in two trials

Sep 22, 2026

The legs of a person sitting on a bed with blue-lit sheets at night

Leg nerve stimulation eased hard-to-treat restless legs in 232 patients, in a study with no comparison group

Sep 22, 2026

A person lying in bed in the dark with a sleep mask pushed up, looking at a phone

Bedtime stories, sleep sounds and sleep-skills audio in an app did not beat a control for 495 poor sleepers

Sep 22, 2026

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A sparse class of brain cells switched on slow-wave sleep in mice when researchers activated them

Sep 20, 2026

A man asleep on his side in bed in soft morning light

More REM and deep sleep tracked with lower risk of dozens of diseases in 95,559 people

Sep 18, 2026

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The brain's immune cells help keep sleep from fragmenting, a study in mice finds

Sep 17, 2026

A woman asleep on her side on white pillows with a hand beneath her head

Soft sounds timed to deep-sleep brain waves increased the flow of fluid through the brain

Sep 17, 2026

An older man asleep on his side in a bed beside a window with house plants

Tau protein in the brain may harm memory partly by breaking up the slow waves of deep sleep

Sep 17, 2026

An older man asleep on his back in bed, with his glasses and a phone on the nightstand beside him

Sleep apnea linked to about 2 more brain cancer cases per 1,000 people over 15 years

Sep 14, 2026

A woman sitting up awake in bed at night under blue light, a lamp glowing on the nightstand

Sleep problems worsened years before a psychiatric diagnosis in working-age Swedes and partly eased after it

Sep 14, 2026

An older woman asleep on a white pillow

Two kinds of sleep apnea that look alike in heart failure split apart once breathing control was measured

Sep 8, 2026

A young man in a grey sweater riding a stationary bike in a dimly lit gym

Evening cycling protected memory after a short night, and deep sleep carried the effect

Sep 8, 2026

An older man lying awake in bed with his arms behind his head while a woman sleeps beside him

Having insomnia alongside sleep apnea tracked 34% more dementia over five years

Sep 2, 2026

A glass mug of warm milk dusted with cinnamon on a wooden coaster

Milk protein cut time spent awake in the night by 8 minutes in people whose sleep was already poor

Sep 1, 2026

A man asleep on his back in a dim bedroom with his mouth open

Belly fat and sleep apnea each predicted the other over nine years, but only under 55

Aug 28, 2026

A hand holding an unlabelled amber dropper bottle with a white pipette, green leaves blurred behind

Cannabinoids cut insomnia severity and added 34 minutes of sleep across 10 trials

Aug 26, 2026

Acupuncture needles placed along the lower back of a person lying face down

Acupuncture and massage moved insomnia by the same amount in advanced cancer

Aug 24, 2026

A person lying awake on their back in a dimly lit bedroom

A THC pill cut PTSD nightmares in a 171-person trial

Aug 17, 2026

A yellow tape measure held around a person's waist over dark clothing

In sleep apnea, waist beat BMI at predicting heart events

Aug 16, 2026

A twin-bell alarm clock on a wooden surface in low, warm early light

Morning people had more heart attacks, not fewer

Aug 14, 2026

The view through a windshield of a multi-lane road at dusk, with red tail lights streaking ahead

One all-nighter hit driving harder than four short nights

Aug 9, 2026

A person lying awake in a dark bedroom beside a clock reading 4:56

Insomnia tracked death risk only when sleep was measured

Aug 8, 2026

A young child asleep under a white duvet with soft toys beside the bed

Melatonin use in children tracked with less REM sleep

Aug 6, 2026

A middle-aged woman sitting on the edge of her bed

Women's night-time waking jumps sharply in midlife

Aug 6, 2026

A person asleep in bed under warm low light

Melatonin: uses, evidence, dosing and safety

Aug 5, 2026

An alarm clock on a stack of books beside an unmade bed in a dim room

Short and long sleep both tracked with Alzheimer changes

Aug 4, 2026

A man asleep on his back in a dim bedroom beside a bedside clock

Unsteady breathing in sleep tracked death risk

Aug 3, 2026

A woman asleep on her side with a gold alarm clock on the bedside table

Nine measures of sleep, none predicted dementia

Aug 3, 2026

A person sitting on the edge of a bed at night wrapped in a duvet

Broken sleep in perimenopause tracked worse thinking decades on

Jul 31, 2026

A bedside table holding a glass of water and small bottles beside an unmade bed

A menopause sleep drug worked at week 4, then didn't

Jul 29, 2026

An older woman lying awake on a bed with the lamp still on

Weak grip and low weight tracked with insomnia after 60

Jul 28, 2026

A person propped up in bed at night using a laptop in the dark

Online CBT for insomnia worked for autistic adults

Jul 27, 2026

A parent settling a sleeping child into bed at night

Tonsil surgery helped snoring children, but not predictably

Jul 26, 2026

A person tapping a blank-screened smartwatch worn on their wrist

Sleep of 7 hours tracked 30% lower death risk by watch and 14% by self-report

Jul 25, 2026

Three friends talking in a brightly lit kitchen late at night, seen through a doorway

Bedtime procrastination cost students 1.4 hours of sleep

Jul 25, 2026

A woman lying awake in bed at night with a bedside lamp glowing

Fecal transplant protocol improved sleep in chronic insomnia

Jul 24, 2026