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Bitter orange, green tea and guarana extracts did not show metabolic effects

Published in Obesity and Diabetes Week, June 19th, 2006

Extracts of bitter orange, green tea and guarana did not show significant metabolic and physiological effects in overweight males.

"This study examined the acute effects of ingesting a widely used commercial formula containing extracts of bitter orange, green tea and guarana (Gx) on the metabolic rate and substrate utilization in overweight, adult males at rest (study 1) and during treadmill walking (study 2). Two different groups of 10 sedentary males with more than 20% body fat participated in studies 1 and 2," scientists in England report.

"In each study," explained C. Sale and colleagues, University of Chichester, "subjects participated in two...

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