Researchers at the Brain Sciences Institute, Swinburne University, in Australia gave healthy participants a bacopa extract for 90 days and compared the results to a group of individuals who got placebo pills. The bacopa monnieri product significantly improved memory accuracy. See 
   There are many herbs and nutrients that are potentially beneficial for memory and mental enhancement including acetyl l-carnitine, DMAE, certain B vitamins, fish oils and others. It is difficult to predict in any one individual which nutrient, herb, or combination will provide benefits.