How sleep works, why it matters for health, and evidence-based habits for falling asleep and sleeping better.
Sleep
Melatonin helps most with jet lag and a late-running body clock, and only a little with general insomnia. Here is what the evidence shows, how much to take and when, and who should avoid it.
James Carter · Oct 31, 2026
Sleep
Twelve practical sleep hygiene habits, from a fixed wake-up time and morning light to caffeine timing and a cool bedroom, plus what to do when you cannot fall asleep and when insomnia needs CBT-I.
Oct 31, 2026 · 8 min read
Sleep
Most adults need at least 7 hours of sleep a night. Here is how sleep needs change with age, the signs you are falling short, and whether weekend lie-ins or extra-long nights help or hurt.
Oct 31, 2026 · 7 min read
