Huperzine A Plant original: Huperzia serrata Part used: The whole herb Specification: 1%, 5%, 98% HPLC Description: Huperzia is a plant genus of the family LYCOPODIACEAE. Members contain huperzine, one of the CHOLINESTERASE INHIBITORS. Functions: 1) Huperzia (Chinese club moss) has been used for centuries for various problems including memory and alertness; 2) huperzineA, is currently used as an acetylcholinesterase (ACE) inhibitor in senile dementia and Alzheimer's disease; 3) Helping to maintain proper memory function.