Sleep Hygiene That Actually Works: Ranked by Evidence

Sleep hygiene advice is usually presented as an undifferentiated list. Some items on that list do considerably more work than others.

The high-impact changes

A consistent wake time, seven days a week, is the single most useful change for most people, because it anchors the entire circadian system. Morning outdoor light exposure reinforces that anchor. Keeping the bedroom cool matters because core temperature must drop for sleep onset. Restricting the bed to sleep so your brain associates the location with sleeping rather than with lying awake is the core of stimulus control, one of the better-evidenced behavioural components.

The moderate-impact changes

Caffeine timing matters given a five to six hour half-life, with a cut-off eight to ten hours before bed suiting most people. Alcohol reduction improves sleep quality in the second half of the night. Darkness in the bedroom supports melatonin production. A wind-down period helps the transition. Regular exercise improves sleep quality, though very late intense sessions can delay onset for some people.

The overrated ones

Blue light blocking glasses have weaker evidence than their popularity suggests, and content arousal from evening screen use likely matters more than wavelength. Elaborate bedtime rituals can become another source of performance anxiety about sleeping. Sleep tracking devices produce useful trends but drive orthosomnia in some users - anxiety about sleep scores that worsens sleep. And if you have chronic insomnia, hygiene alone is not the treatment: CBT-I is first-line and considerably more effective.

If you are considering NeuronGold

Read the NeuronGold ingredients page before ordering, check the 60-day guarantee terms, and if you take prescription medication show the label to a pharmacist — the L-Tryptophan content matters for anyone on serotonergic medication. Our buyer’s checklist sets out twelve checks worth running first.