India, Nov. 23 -- Caffeine is many people's trusted morning companion, a quick pick-me-up and productivity booster that keeps the day moving. From coffee to energy drinks, it powers millions through busy mornings and late-night deadlines. However, moderate caffeine intake (approximately 400 mg per day for most healthy adults, as reported in Food and Chemical Toxicology) is generally safe. Exceeding that amount can turn this everyday ally into a source of stress for your body and mind. Overdosing on caffeine doesn't necessarily mean an emergency. Still, it does mean consuming enough to trigger noticeable physical and psychological effects, such as racing heartbeats, jitters, disrupted sleep, or even digestive issues.

Suppose you've been f...