‘A more severe flu infection places a greater inflammatory and metabolic load on the body, often requiring longer periods of ...

Everyone has those days when they could use a bit of a jump-start, mentally and physically. But for some people, feeling spent is more than an occasional occurrence. According to a 2025 analysis of ...

Suddenly stopping caffeine can cause the brain to go into withdrawal. This happens because caffeine temporarily block receptors, and then when the caffeine is stopped, the brain releases too much of ...

(CNN) — “I’m exhausted.” Chances are, you’ve already said this today or caught someone else inserting it into a conversation. But it can be difficult to determine whether the sleepiness or fatigue you ...

Get inspired by a weekly roundup on living well, made simple. Sign up for CNN’s Life, But Better newsletter for information and tools designed to improve your well-being. But it can be difficult to ...

If you regularly wake up from seven or eight hours of sleep still feeling tired, your instinct might be to start aiming for nine or even 10 hours a night — but that move might not solve the problem.