Guarana

Guarana is a paste made from the seeds of a climbing shrub. The active component of Guarana is a stimulant containing 3 times as much caffeine as found in coffee beans. There is little evidence to support claims that it can help with weight loss, and no adequate studies have been performed or published using this substance for weight loss. In keeping with other thermogenics Guarana is associated with a number of side-effects including anxiousness, irregular heartbeat and dizziness.