The leaves of this plant contain both caffeine and theobromine, two methylxanthines which boost metabolism. Originating from South America, Yerba Mate’ is a tree cultivated in Paraguay, Brazil and northern Argentina. The leaves of Yerba Mate’ are made into a tonic and stimulating beverage, due to the presence of both caffeine and theobromine. Decoction of Yerba Mate’ is drunk both hot and cold, to alleviate fatigue, suppress appetite, stimulate body and mind, and boost metabolism.  

Analytical studies show that dried Yerba Mate’ naturally contains approximately 0.56% caffeine.  Yet some standardized extracts contain 2% caffeine, approximately four times the caffeine of dried Yerba Mate’. Most significant is the theobromine value of concentrated extracts. Like caffeine, theobromine is a central nervous system stimulant alkaloid, though it is appreciably weaker than caffeine. But theobromine is a stronger cardiac stimulant, smooth muscle relaxant, and diuretic. While dried Yerba Mate’ naturally contains approximately 0.03% theobromine, some extracts on the market today contain .2% theobromine. This six-fold increase in theobromine gives concentrated extracts of YerbaMate’ enhanced metabolic, diuretic, and appetite-suppressing properties. Yerba Mate’ and concentrated extracts of this plant are for those who wish to suppress appetite, boost metabolism and achieve a leaner body.

Antioxidant activity of a botanical extract preparation of Ilex paraguariensis: prevention of DNA double-strand breaks in Saccharomyces cerevisiae and human low-density lipoprotein oxidation.
Bracesco N, Dell M, Rocha A, et al; J Altern Complement Med.; 2003 June


Researching on new species of "Mate": Ilex brevicuspis: phytochemical and pharmacology study.
Filip R, Ferraro GE.; Eur J Nutr.; 2003 Jan