Good news caffeine lovers! A study has revealed that four cups of coffee or eight cups of tea, which is equivalent to 400mg of caffeine, has no lasting damage on the body.The study also shows that caffeine boosts both mental and physical performance. According to researchers, caffeine, found in tea, coffee and fizzy drinks is safe – even for pregnant women and young children. It found that sticking to the recommended daily amount of 400mg – the equivalent four cups of coffee or eight cups of tea – has no lasting damage on the body. Dr Carrie Ruxton, who has previously advised the NHS and European Food Safety Authority, was behind the myth-busting review. The people who cut out tea and coffee may miss out on the potential health benefits of the compounds they contain, explained the researchers. Tea is the best way to get your hit of caffeine as it has half the amount of coffee and is packed with a variety of health-boosting polyphenols and antioxidants.