Based onthe Nature feature “How to get the best night’s sleep: what the science says” (2025-09-30)

Have you ever experienced this: you are clearly exhausted, but the moment you lie down your mind becomes more alert; you sleep until noon on weekends, then feel jet-lagged again on Monday; you bought pillows, aromatherapy, and melatonin, yet the results are still inconsistent?

This Nature report makes a very direct point: sleep is not a minor issue that can be “fixed” by adding more tools; it is a systems-level process governed by circadian rhythms (your internal biological clock). The truly effective measures are often surprisingly simple.

I. The article’s single most important message: if you want to sleep well, first re-establish the difference between “daytime” and “nighttime”

The strongest signal for setting the circadian system is light. The problem with modern life is that daytime is too dim (indoors) and nighttime is too bright (screens + lighting). As a result, your body cannot tell whether it should be awake or asleep.

[Principle 1] Make daytime bright enough and nighttime dark enough

Focus on “contrast,” rather than fixating on any one color of light. Blue light is indeed more likely to interfere at night, but if the intensity is high enough, light of any color can suppress melatonin and disrupt sleep.

What is even easier to overlook is this: the less light you get during the day, the more “harmful” the same light exposure can be at night. Daytime light exposure can, to some extent, buffer the impact of nighttime light.

Within 30-60 minutes of waking up, try to spend 10-20 minutes outdoors in natural light (a walk or buying breakfast both count). Even on a cloudy day, it is still far stronger than indoor light.

During the day, work or study as close to a window as possible. If conditions allow, supplement with brighter indoor lighting that more closely resembles daylight.

In the evening, dim the lighting throughout your home: use small lamps in the living room and bedroom instead of overhead lights, and keep them as dim as practical.

Start “reducing light exposure” 1 hour before bed: lower screen brightness and turn on warm-color or night mode; better still, avoid screens if possible.

If you get up during the night, avoid turning on bright lights: use a low-brightness amber night light (or dim hallway lighting) to reduce disruption to your biological clock.

II. What you think is just a “bedtime routine” may be less important than this: meals also follow a “biological clock”

[Principle 2] Keep meal times consistent and have dinner as early as practical

The report emphasizes that the body’s ability to process food also follows circadian rhythms—the same meal places a different metabolic burden on the body in the morning than it does at night. When dinner is too late, digestion, body temperature, blood glucose, and other rhythms fall out of sync with the brain’s master clock, which can affect both falling asleep and maintaining continuous sleep through the night.

Whenever possible, finish dinner at least 3 hours before bedtime; afterward, avoid snacks and sugary drinks (drink water if you are thirsty).

Try to keep eating on a regular schedule: have breakfast, lunch, and dinner at roughly the same times each day.

If you must have a snack before bed, choose something light and easy to digest, such as yogurt or a small portion of oats or cereal.

Caffeine remains in the body for hours: avoid caffeinated drinks (coffee, strong tea, energy drinks) later in the afternoon whenever possible.

Alcohol may seem to help you fall asleep, but it often makes sleep lighter and more fragmented in the second half of the night.

Bonus: Which foods are more conducive to sleep?

The report mentioned several dietary patterns associated with better sleep: diets high in sugar and saturated fat may lead to lighter, more easily disrupted sleep; by contrast, eating more plant-based foods (such as fruits and vegetables) during the day is associated with more continuous sleep. Some studies also suggest that walnuts may be associated with melatonin levels and improved sleep quality.

Make sure you eat enough “fruits and vegetables” during the day (the earlier, the better), and avoid making dinner too greasy or too sweet.

If you want to try food-based sleep support, have walnuts as a daytime snack (but avoid eating large amounts right before bed).

3. It is not enough to simply “get 8 hours of sleep”: regularity itself is a health indicator

[Principle 3] Wake-up time matters more than bedtime—stabilize your schedule first

The report notes that many people rely on alarm clocks on weekdays and catch up on sleep on weekends, essentially creating “social jet lag” for themselves. Research also suggests that an irregular daily schedule is associated with poorer long-term health outcomes and may even predict risk better than sleep duration alone.

A practical approach is this: fix your wake-up time first, then let your bedtime follow naturally.

1. Choose a wake-up time you can maintain long term (and keep the difference between weekdays and weekends within 1 hour whenever possible).
2. As soon as you wake up, open the curtains / go to the window and let light signal to your brain that “daytime has begun.”
3. If you did not get enough sleep the night before, a 10–20 minute nap during the day is fine, but try not to nap too late (to avoid affecting nighttime sleepiness).
4. If you feel very tired on the weekend, it is fine to sleep 1–2 extra hours to “catch up a little,” but do not sleep until the afternoon and disrupt Monday’s rhythm.

4. A 7-day action checklist that can help you feel a difference

You do not need to get everything perfect all at once. Treat the next 7 days as a small experiment: you only need to make these 3 things more consistent than they are now.

V. Common pitfalls and what to do about them (for night owls and people under a lot of stress)

1) The more anxious you are to fall asleep, the harder it becomes to sleep.

Treating sleep as a “must-complete task” often backfires. Try changing the goal: tonight I’ll just dim the lights, eat dinner earlier, and get morning light tomorrow — whether I fall asleep is up to my body.

2) What if I have to look at my phone at night?

Rather than insisting on complete abstinence, a more workable approach is to lower the brightness, switch to warm colors, choose non-stimulating content (such as light audio or comedy), and set a clear stopping point.

3) What should shift workers, parents, and business travelers do?

The report also acknowledges that reality does not always cooperate with circadian rhythms. The idea is: do as much as you can. For example, on night shifts, try to keep meals on a relatively regular schedule; if you can get a bit of daylight, get a bit of daylight. Every action that makes things a little more regular is helping you.

VI. When should you seek professional help? (Important)

For more than 3 consecutive months, if you have difficulty falling asleep, wake up too early, or have fragmented sleep on at least 3 nights per week, with noticeable daytime impairment.

Severe snoring, waking up gasping, morning headaches, or pronounced daytime sleepiness (watch for sleep apnea).

If you need to rely on alcohol, sedative-hypnotics, or combining multiple supplements on your own to fall asleep long term.

If any of the above apply, prioritize an evaluation at a sleep clinic/pulmonology department/psychiatry or mental health department. Lifestyle changes matter, but not every problem can be solved by self-discipline alone.

References

1) Lynne Peeples. How to get the best night’s sleep: what the science says. Nature (News Feature), 30 Sep 2025. DOI: 10.1038/d41586-025-03148-8.

2) Chinese summary reference: The Paper · Paike, “Nature headline: How Can You Sleep Well Scientifically? These Three Things Are Essential” (2025-10-05).