Yerba Mate' was first introduced into the United States in the 1970's. It was thought of as a coffee alternative, a natural stimulant without side effects and toxicity. To this day, Yerba has been found to contain practically all the vitamins necessary to sustain life. Some of the effects of Yerba are: strengthened immunity, cleans and detoxify the blood, retards signs of aging, strengthens nervous system, reduces fatigue, stimulates the mind, controls appetite, decreases the effects of disease, reduces stress and improves sleep patterns.