85% Organic Yerba Mate and 15% Catuaba bark. Catuaba (pronounced ka-twa-BAH) Catuaba has been used for centuries by the Brazilian Tupi Indians. It is well know in Brazil for its impressive physiological and psychological benefits. The Catabua bark was used by the Tupi to relieve pain, improve memory, ease depression, and control anxiety.  In fact, the Tupi were so enamored of the powers of this tree bark, they even spread the word to other tribes and wrote songs celebrating its amazing benefits.