The article warns that excessive caffeine intake can disturb sleep, digestion, mood and overall wellbeing, even though moderate amounts are generally safe. Common signs of overdosing include persistent jitters, anxiety, insomnia, rapid heartbeat, digestive issues, and chronic headaches, all linked to caffeine’s stimulating effects on the nervous system and stomach acid production. Dr Nisha, Nutritionist, Motherhood Hospital, Gurgoan, explains that many people don’t realise how quickly caffeine builds up in the body and can overstimulate the nervous system, making it crucial to listen to early warning signs. Reducing intake gradually and setting a caffeine cut-off time can help maintain better sleep and health.