Can You Take Alpha-GPC and Phosphatidylcholine Together?

Dose or timing may matter

The short answer

Both Phosphatidylcholine and Alpha-GPC are choline donors. Stacking two choline sources provides excessive choline substrate that may cause cholinergic side effects including headaches, nausea, and fishy body odor from trimethylamine buildup.

How to arrange timing

Choose one choline source. If using both, reduce doses significantly and monitor for headaches or fishy body odor.

Reference

Reference noted for this combination: Zeisel SH. Choline: critical role during fetal development and dietary requirements in adults. Annu Rev Nutr. 2006;26:229-250.

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.