Huperzineopen_in_newnon-nutrient_non-botanicalHuperzine A is a compound derived from Chinese club moss that acts as an acetylcholinesterase inhibitor. By supporting levels of the neurotransmitter acetylcholine, it may help enhance cognitive functions such as memory recall, learning, and mental focus.$39.48 median price$1.28 per serving90 mcg per serving Show details expand_more