There’s a good reason why the cartoon character Popeye becomes super-human when he necks a tin of spinach. Although the concept might be exaggerated a little, eating spinach once a day is a time honoured remedy for relieving fatigue.

What’s more this is no old wives tale – there is actually scientific reasoning behind it. Spinach contains potassium as well as many B vitamins, all of which are key to energy metabolism.

There you go – one to bore your friends with down the pub later. Not that we encourage drinking.