Does Alcohol Affect L-Theanine?

Amount or timing may matter

The short answer

L-theanine enhances GABA activity. Combined with alcohol's GABAergic effects, excessive sedation may occur.

How to arrange timing

Separate L-theanine from alcohol by at least 4 hours.

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.