The discovery of nootropic substances has led to advances in the ability to enhance memory, focus, and cognition. Nootropics are supplements, nutrients, and smart drugs that provide improvements to attention, working memory, and other aspects of mental function.   Advantages of Memory Enhancement   People seek to improve working memory, focus, and concentration for many reasons. College students use these products to enhance performance at school. Executives use them to sharpen their focus at work. Those with…