Does Caffeine Affect Green Tea Extract (EGCG)?

May affect absorption or how you feel

The short answer

EGCG (green tea extract) already contains caffeine. Additional caffeine may cause excessive stimulation.

How to arrange timing

Account for caffeine in green tea extract when consuming caffeinated beverages.

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.