Short answer: An alkaloid extracted from Chinese club moss, Huperzia serrata. It acts on acetylcholinesterase, the enzyme that breaks down acetylcholine.
Why this ingredient "most warrants a conversation with a pharmacist"
Because it acts on the same system as some prescription medicines, this is one of the ingredients here that most warrants a conversation with a pharmacist — a direct, prioritized caution.
Why this connects to a specific class of prescription medication
May interact with cholinesterase inhibitors such as donepezil, and with anticholinergic medicines — a genuine, mechanism-based overlap worth understanding.
💊 Worth knowing: not appropriate to combine with prescription treatments for memory conditions without medical supervision.