Guarana (Paulinnia cupana) is a common ingredient in energy caps and drinks. Guarana powder contains about 4.2% caffeine and several other components like guaranine, theobromine and theofilline.
You can mix the guarana powder with any beverage you like. Guarana powder will not easily dissolve in water. Guarana is a common ingredient in energy caps and drinks. This potent extract contains 330 mg caffeine per gram (3:1) which enables you to encapsulate guarana, though it can also still be used as a tea.