Does Tea Affect Caffeine?

Use extra care with this combination

The short answer

Tea contains 30-70 mg caffeine per cup. Additional caffeine supplements stack with tea caffeine, increasing risk of anxiety, palpitations, and insomnia.

How to arrange timing

Account for tea's caffeine content when taking caffeine supplements. Reduce supplement dose accordingly.

Reference

Reference noted for this food and supplement combination: FDA

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.