Fact checked by Nick Blackmer Caffeine stays in your system for up to 10 hours, with peak levels between 15 minutes and two ...

A genetic study reveals that it is not coffee itself, but how long caffeine remains in the blood, that influences the risk of diabetes.

From espresso to energy drinks to supplements, caffeine comes in many forms, Rula notes. And if you're like most people, you probably enjoy a cup of coffee each morning or a late-afternoon soda to ...

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When I finally confronted my dependency and gave up coffee three months ago, my body wasn’t happy. In the mornings during the time that I would normally have my espresso, my thoughts tried to bargain ...

It’s a kick-start for the day, a jolt many of us need to power through, and one of the last socially acceptable addictions. It’s only when we have to go without coffee that we realise how badly we ...