Special K – designed to aid weight loss, or keep weight down.

In each serving, you might be getting a quick surge of energy from a smaller bowl, and thus fewer calories – yes.

But in 100g, you’re taking on 28g of sugar. You can cut the sweet stuff down a little by choosing the plain variety (17 g) or the honey flavoured version (18 g) – but even these contain around 17 times more sugar than a good old bowl of oats…