Guarana

Guarana is the common name of a fiery little plant that is commonly found in South America. Guarana fruits are small, bright-red, and contains black seeds. The seeds are rich in caffeine and contain up to 4-8% caffeine, more than coffee beans. The seeds are also rich in tannins and xanthine alkaloids theophylline and theobromine.

The surprising thing about Guarana is that it is chemically identical to caffeine and has been used for thousands of years by native Amazonians to help maintain their stamina and increase physical endurance.

Thanks to its wonderful ability to produce temporary energy bursts, Guarana is gaining worldwide recognition not only for its "stimulating" effects but, in fact, more for its "fat-burning" properties. Since Guarana is practically interchangeable with caffeine, it produces similar metabolic effects as that powerful stimulant, including increased heart rate, blood pressure, respiration, adrenal activity, and mental alertness.