Does Tea Affect L-Theanine?

May affect absorption or how you feel

The short answer

Tea naturally contains L-theanine (25-60 mg/cup). Supplemental L-theanine stacks with tea's content, potentially causing excessive sedation in sensitive individuals.

How to arrange timing

Account for tea's natural theanine content when dosing L-theanine supplements.

Reference

Reference noted for this food and supplement combination: Examine.com 2024

Important context

The effect can also change with food amount, supplement 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.