Who knew that a 25g bag of crisps (132 calories) provides more potassium than an average banana – and 40% more vitamin C than a small bunch of red grapes? These days, most crisps are also fried in sunflower or rapeseed oil, which is high in unsaturated fat, so won’t raise your blood cholesterol. One multipack bag of Walkers Ready Salted supplies just 6% of your daily recommended salt limit. In the USA, the same amount of Lay’s Classic has a third more salt and twice as much saturated fat, but the other goodness still applies if you keep the portion controlled. (25g of Lay’s is about 18 chips.)

Chips, chocolate and other surprisingly healthy foods