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Green Tea Thermogenesis
Metabolism Booster
Two studies about green tea thermogenesis or the heat burning process.
What is thermogenesis? It is the process by which the body generates heat and increases metabolism. By burning off the extra calories, it promotes weight loss.
Weight loss supplements such as ephedra and caffeine, stimulate thermogenesis. Ephedra is great for increasing metabolism, but can have dangerous side effects. It has been linked to heart attack and deaths.
Caffeine too raises metabolism and burns fat. But too much caffeine can cause insomnia, anxiety, upset stomach and frequent urination for some people.
On the other hand, green tea is safe. It is the second most widely consumed beverage in the world. Green tea thermogenesis is an effortless way to natural weight loss.
Swiss scientist Dr. Dulloo conducted two human trials to investigate green tea thermogenesis. He found that green tea extract increases thermogenesis to a much greater extent than caffeine alone would.
1999 Study
The 1999 study consists of 10 healthy men. They drank either green tea extract, caffeine or placebo.
The green tea extract beverage contained 90 milligrams of epigallocatechin gallate (EGCG) and 50 milligrams of caffeine.
EGCG, found in the highest concentration in green tea, is the most active and best researched of all green tea compounds.
Dr. Dulloo found that those who drank green tea extract burn 4% more energy over 24 hours compared to the placebo. The increase in metabolism is greater than that which could be explained by caffeine alone.
2000 Study
In another 2000 study, Dr. Dulloo went on to confirm the important role of green tea extract in raising metabolism. He concluded that green tea stimulates thermogenesis "to an extent which is much greater than can be attributed to its caffeine content per se."
No wonder green tea is a favorite ingredient in many weight loss products. It has been found to increase and prolong the thermogenesis process.
So, green tea can help you burn 4% more energy a day. If you burn 2,000 calories a day, this translates to 80 calories, roughly the same amount of calories in a small banana.
It may not sound a lot, but green tea thermogenesis is not the only way green tea helps lose weight. Green tea also promotes fat burning and reduces absorption and storage of fat.
The sum total of these actions has not yet been quantified, but is likely to be significant, especially when added up over a long period of time.
Green tea is all the more remarkable when you consider all the other health benefits that it bestows.
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References
Dulloo AG, Duret C, Rohrer D, Girardier L, Mensi N, Fathi M, Chantre P, Vandermander (1999). Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans. The American journal of clinical nutrition. 1999 Dec;70(6):1040-5.
Dulloo AG, Seydoux J, Girardier L, Chantre P, Vandermander J (2000). Green tea and thermogenesis: interactions between catechin-polyphenols, caffeine and sympathetic activity. International journal of obesity and related metabolic disorders : Journal of the International Association for the Study of Obesity. 2000 Feb;24(2):252-8.
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