The science of sleep has advanced considerably in recent decades, yet public knowledge about it lags far behind. A physician is working to close that gap with five research-backed sleep facts — beginning with one of the most significant and least discussed: women need more sleep than men, and science has a clear explanation for why.
The physician points to multitasking as the central mechanism. Women, on average, spend more of their day engaging in cognitively demanding multitasking — managing multiple responsibilities, switching between tasks, and processing various streams of information simultaneously. This intensive use of the brain’s executive resources during the day creates a greater need for recovery during sleep. The result is approximately 20 additional minutes of sleep per night compared to men.
The normal time to fall asleep — between 10 and 20 minutes — is a detail most people have never been specifically taught. It matters because deviations from this range in either direction can signal sleep health issues. Falling asleep very quickly suggests the body has reached an unsustainable level of depletion. Regularly taking 30 minutes or more to fall asleep may indicate insomnia, which is one of the most common and most undertreated sleep disorders.
Dream amnesia is nearly universal, affecting roughly 95 percent of dream content. Dreams are generated during sleep phases that don’t effectively encode experiences into long-term memory. By the time we’re fully awake and alert, most dream content is already gone. Keeping a journal next to the bed and writing immediately upon waking — even fragmentary notes — is the most effective way to capture what remains.
Two final insights complete the physician’s recommendations. After 17 consecutive hours of wakefulness, cognitive performance drops to a level comparable to mild alcohol intoxication — a comparison that highlights the genuine risk of extreme sleep deprivation. And with melatonin, starting small is the scientifically sound approach: 0.5 mg closely mirrors the body’s natural output and often outperforms the much larger doses commonly sold in stores.