Nutritionist Guido Camps (Wageningen University) explains that sugar is primarily an energy source. It helps you to take action.
According to the WHO, you can consume the equivalent of about fourteen sugar cubes per day. Of course it is not literally about those cubes of sugar, but about what you get from your diet. The average Dutch person eats more than that, and comes out at 29 lumps a day.” That is a problem, because the surplus of sugar that you ingest is converted into fat if you do not consume it.