Guarana Extract is a small bean that grows predominantly in South America, especially in the Amazon jungle. The seeds of Guarana are known to be rich in caffeine. Guarana has a powerful effect on increasing the metabolic rate, suppressing your appetite and enhancing both physical and mental performance. Guarana Extract can be used to increase mental alertness, fight fatigue, increase stamina and physical endurance. Due its slower absorption rate, Guarana tends to give a more sustained supply of energy when compared to the instant hit of caffeine. It is a particularly useful supplement for anyone looking to lose weight or increase their physical and mental stamina. It is suggested that Guarana helps your brain to ignore signals of discomfort and fatigue. This makes Guarana a highly effective supplement for improving performance during short-term, high-intensity exercise, such as weight training. Warnings:Guarana Extract is a caffeine containing herb and should not be overused. Pregnant women or nursing mothers should not use Guarana Extract. Overuse can cause strain on the urinary tract, heart palpitations or insomnia. You should not use Guarana Extract with other stimulants. If you have any concerns please consult a doctor before use.