Yerba Mate is a plant that grows as a small tree or shrub in South America. Yerba Mate is consumed by millions of South Americans as a healthful alternative to coffee as it is much gentler on the stomach. Yerba Mate is also known to be a cardiovascular aid, hunger suppressant and mental and physical stimulant. Unlike most leaves, it does not become bitter or astringent when steeped for extended period of times. The leaves can be steeped numerous times. However, this tea should be made using hot, not boiling water.