Does Tea Affect Guarana?

Use extra care with this combination

The short answer

Guarana contains caffeine (up to 6%). Combined with tea's caffeine, total intake may exceed safe limits, causing cardiovascular and neurological side effects.

How to arrange timing

Monitor total caffeine intake from tea and guarana combined. Do not exceed 400 mg/day total.

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.