Many studies have previously shown that up to 400mg of caffeine per day is the maximum amount you should be consuming and that any more can make it harder to fall asleep.
I tried Christmas drinks at Costa, Café Nero and Starbucks - and one tasted the best - Priyanka Patel coventrytelegraph.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from coventrytelegraph.net Daily Mail and Mail on Sunday newspapers.
Studies show popular coffee shop festive-themed drinks contain the equivalent of six cups of instant coffee in just one drink - and it can impact your sleep schedule
Paying homage to its Italian-inspired influence, the cafe s selection include the likes of a Panettone Latte, Florentine Mocha and a Luxury Amaretto Mince Pie.