It is widely believed that eating chocolate can cause acne  Indeed, many people who are susceptible to acne report that, in their own experience, eating large amounts of chocolate is invariably followed by an outbreak of that skin condition  However, it is likely that common wisdom has mistaken an effect for a cause
Several recent scientific studies indicate that hormonal changes associated with stress can cause acne and there is good evidence that people who are fond of chocolate tend to eat more chocolate when they are under stress
People are mistaken who insist that whenever they eat large amounts of chocolate they invariably suffer from an outbreak of acne,