Eating a piece of chocolate half an hour before the exam and drinking a cup of tea or coffee in the morning and evening during the exam will help candidates to have enough brains; In addition, DHA and various vitamins and minerals can be supplemented.

British researchers have found that flavanols rich in chocolate can increase brain blood flow, thus increasing the supply of glucose and oxygen to the brain. In particular, the researchers pointed out that eating a piece of chocolate before the math exam is beneficial to the candidates.