Can You Take L-Theanine and Passionflower Together?

Use extra care with this pair

The short answer

L-Theanine promotes relaxation via glutamate modulation while passionflower enhances GABAergic activity; stacking may cause excessive sedation.

How to arrange timing

Reduce doses if combining; avoid tasks requiring full alertness.

Reference

Reference noted for this combination: Hidese et al., 2019, Nutrients

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.