Huperzine A is an isolated extract derived from the clob moss Huperzia serrata which produces benefits to the nervous system. Specifically, Huperzine A benefits memory, learning, and other important cognitive functions. The brain-boosting effects of Huperzine A may be beneficial during studying prior to an exam and may reduce the negative effects of aging to normal memory. visit us: http://www.tasmanhealth.co.nz/source-naturals-hupe rzine-a/ for more details!!