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 rely on it.

The jitteriness and headaches from caffeine withdrawal can be so overpowering that many of us turn to decaffeinated instead, thinking surely it must be better for our health. But that might not be true, the experts say – not least because decaf coffee is not actually completely caffeine-free after all.

The Telegraph London