Club Moss <i>Huperzia serrata</i> (IMAGE) Emory Health Sciences Caption Huperzine A comes from the club moss Huperzia serrata (shown) and is available as a dietary supplement. While it is beneficial in mouse models of epilepsy, huperzine A is not FDA-approved and clinical trials are necessary to assess safety and efficacy. Credit Photo from Wikimedia Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.