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Dietary SupplementFor Learning And Memory Huperzine A is a natural compound extracted from the Chinese club moss Huperzia serrata. Worldwide studies have shown that Huperzine A supports learning and memory by protecting acetylcholine a neurotransmitter that acts as a messenger molecule in the brain. Huperzine A may be used for both short-term "brain boost" needs such as preparing for a test as well as more long-term needs such as reducing the mild memory loss associated with normal aging.