Research has found that sweet treats have no impact on mood and that the concept of a sugar rush may be a myth. The research was carried out by the Humboldt University of Berlin, with help from academics at the universities of Warwick and Lancaster and published in the journal Neuroscience and Biobehavioral Reviews.

A review of 31 research papers led by Dr Konstantinos Mantantzis revealed that eating carbohydrates has no effect on mood. This is true regardless of how much sugar is consumed or the activities people perform afterwards.

They found munching on caramel, toffee or fudge leaves people feeling exhausted and less alert an hour later.