Acne and Food .....always

The doubt is always present, a link between diet and acne?

It is unclear whether the food has real influence on acne.
He arrived yet many of us to wake up with a button of acne, we have attributed the unusual consumption of food the day before (too much chocolate for example).
Real simple coincidence or cause and effect relationship?
In addition, some studies tend to show that a diet too rich to be an encouraging factor.
However, most major studies suggest that food is not really a cause of acne