Can You Take Alpha-GPC and Huperzine A Together?

Use extra care with this pair

The short answer

Alpha-GPC provides choline for acetylcholine synthesis, while Huperzine A prevents acetylcholine breakdown by inhibiting acetylcholinesterase. This dual-action combination can lead to excessive acetylcholine accumulation, causing cholinergic crisis symptoms.

How to arrange timing

If combining, use significantly reduced doses (50% or less of standalone dose for each). Monitor for excessive sweating, nausea, or bradycardia.

Reference

Reference noted for this combination: Tang XC, et al. Effect of huperzine A, a new cholinesterase inhibitor, on the central cholinergic system of the rat. J Neurosci Res. 1989;24(2):276-285.

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.