Can You Take Caffeine and Guayusa Together?

Dose or timing may matter

The short answer

Guayusa contains caffeine or has stimulant properties. Combining with additional caffeine may cause excessive stimulation, insomnia, and increased heart rate.

How to arrange timing

Limit total caffeine intake when using Guayusa. Avoid taking both close together, especially in the afternoon or evening.

Reference

Reference noted for this combination: Examine.com; Natural Medicines Comprehensive Database

Important context

Whether supplements suit you together also depends on 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.