While acne has long been a problem for adolescents, in recent decades - the last fifty years specifically - acne has been on the rise among adults as well, particularly among women. Many scientists have traced his upsurge to changes in the dietary habits of North Americans. The Clear Skin Diet is designed to help those who suffer from acne to understand what it is, Why they have it, What it has to do with their eating habits, and what they can do to prevent it or lessen its impact.