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Fat burning effect of guarana |
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Lipid metabolism in trained rats: effect of guarana (Paullinia cupana Mart.) supplementation.
Clinical Nutrition. 2005 December;24(6):1019-28
Guarana is widely consumed by athletes because of its claimed fat burning activity and positive effect on physical activity. This study investigated the effect of complete and decaffeinated guarana extracts supplementation on the fat metabolism of rats. By using decaffeinated extract the researchers tried to find whether possible effects were caused by caffeine alone or by other phytochemicals in guarana. They found that only whole guarana extract had an influence on lipid metabolism. Therefore caffeine is the only phytochemical responsible for the observed beneficial effects.
Weight loss and delayed gastric emptying following a South American herbal preparation in overweight patients.
Journal of Human Nutrition & Dietetics. 2001 June;14(3):243-50
Obesity is taking epidemic proportion in some parts of the world resulting in increased incidences diseases such as diabetes and hypertension. Herbal preparations are sometimes used to combat obesity. The aim of this study was to determine the effect of a herbal preparation consisting of yerbe mate, guarana and damiana on gastric emptying and weight loss of 44 overweight patients. The researchers found that the herbal preparation increased gastric emptying time by 50% and reduced body weight by about 5 kg over a period of 45 days. They concluded that the herbal preparation significantly delayed gastric emptying and induced significant weight loss in overweight patients.
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