Sleep Hygiene Myths That Are Keeping You Awake

The "eight hours" figure is a population average, not a universal prescription. Research consistently shows that healthy sleep duration ranges from about seven to nine hours for most adults, with meaningful variation at both ends. Some people genuinely thrive on seven hours; others feel impaired below nine. Tracking how you feel — your alertness, mood, and concentration — is a more reliable guide than hitting an exact number. Persistently needing significantly more or less than the typical range is worth discussing with a doctor.

Alcohol has a sedative effect that can make it easier to drift off initially. However, as your body metabolizes it, sleep architecture is disrupted — particularly REM (rapid eye movement) sleep, which plays an important role in memory consolidation and emotional regulation. Studies consistently show that people who drink before bed report more nighttime awakenings and feel less rested in the morning, even if they don't recall waking. Regular use as a sleep aid can also build tolerance, making the problem worse over time.

Blue light does suppress melatonin production, the hormone that signals nighttime to your brain. But the magnitude of this effect from a typical smartphone screen is smaller than often reported. Research suggests that the cognitive stimulation of scrolling — reacting to news, social media, or work emails — keeps the brain in an alert state far more disruptively than the light itself. Cutting off mentally activating content 30–60 minutes before bed tends to have a bigger impact than simply switching to night mode. If you do use screens, low-stimulation content is less disruptive than high-engagement material.

While some recovery does occur after acute sleep loss, chronic sleep debt doesn't erase cleanly with a weekend lie-in. More importantly, shifting your sleep and wake times significantly on weekends — a phenomenon sometimes called "social jet lag" — can misalign your body clock, making Monday mornings feel particularly rough. Studies have linked chronic social jet lag to increased fatigue, mood disturbances, and metabolic effects. The most evidence-backed approach is keeping a consistent wake time every day, even on weekends, to anchor your circadian rhythm.

Milk contains tryptophan, an amino acid involved in serotonin and melatonin production, which is the scientific basis for this belief. However, the amount of tryptophan in a glass of milk is not sufficient to measurably affect sleep in controlled studies. What may help is the habit itself — a warm, calming drink as part of a consistent wind-down routine signals to your brain that sleep is approaching. The ritual matters; the milk is largely incidental. Non-caffeinated herbal teas or simply warm water may work just as well for the same reason.