Huperzine A

Huperzine A is a naturally occurring alkaloid extracted from the plant Huperzia serrata (a type of club moss). It is best known as a potent, reversible acetylcholinesterase inhibitor that prevents the breakdown of acetylcholine, a neurotransmitter essential for learning and memory. It is often used in nootropic supplements and has been investigated for Alzheimer’s disease and age-related cognitive decline.