Chinese Green Tea - Research Paper for a Support System
Research Paper For A Support System
Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans.Abdul G Dulloo, Claudette Duret, Doroth�e Rohrer, Lucien Girardier, Nouri Mensi, Marc Fathi, Philippe Chantre and Jacques Vandermander
From the Department of Physiology, Faculty of Medicine, University of Geneva; Geneva University Hospital; and Laboratoires Arkopharma, Nice, France.
Background: Current interest in the role of functional foods in weight control has focused on plant ingredients capable of interfering with the sympathoadrenal system.
Objective: We investigated whether a green tea extract, by virtue of its high content of caffeine and catechin polyphenols, could increase 24-h energy expenditure (EE) and fat oxidation in humans.
Design: Twenty-four-hour EE, the respiratory quotient (RQ), and the urinary excretion of nitrogen and catecholamines were measured in a respiratory chamber in 10 healthy men. On 3 separate occasions, subjects were randomly assigned among 3 treatments: green tea extract (50 mg caffeine and 90 mg epigallocatechin gallate), caffeine (50 mg), and placebo, which they ingested at breakfast, lunch, and dinner.
Results: Relative to placebo, treatment with the green tea extract resulted in a significant increase in 24-h EE (4%; P < 0.01) and a significant decrease in 24-h RQ (from 0.88 to 0.85; P < 0.001) without any change in urinary nitrogen. Twenty-four-hour urinary norepinephrine excretion was higher during treatment with the green tea extract than with the placebo (40%, P < 0.05). Treatment with caffeine in amounts equivalent to those found in the green tea extract had no effect on EE and RQ nor on urinary nitrogen or catecholamines.
Conclusions: Green tea has thermogenic properties and promotes fat oxidation beyond that explained by its caffeine content per se. The green tea extract may play a role in the control of body composition via sympathetic activation of thermogenesis, fat oxidation, or both.
References:
- About Green Tea - (https://www.ncbi.nlm.nih.gov/pubmed/10956382)
- Green Tea - (https://en.wikipedia.org/wiki/Green_tea)
- Beneficial Effects of Green Tea: A Literature Review - (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2855614/)
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Dr. Trupti Shirole. (2024, August 05). Chinese Green Tea - Research Paper for a Support System. Medindia. Retrieved on Jan 17, 2025 from https://www.medindia.net/health/diet-and-nutrition/chinese-green-tea-research.htm.
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Dr. Trupti Shirole. "Chinese Green Tea - Research Paper for a Support System". Medindia. Jan 17, 2025. <https://www.medindia.net/health/diet-and-nutrition/chinese-green-tea-research.htm>.
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Dr. Trupti Shirole. "Chinese Green Tea - Research Paper for a Support System". Medindia. https://www.medindia.net/health/diet-and-nutrition/chinese-green-tea-research.htm. (accessed Jan 17, 2025).
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Dr. Trupti Shirole. 2024. Chinese Green Tea - Research Paper for a Support System. Medindia, viewed Jan 17, 2025, https://www.medindia.net/health/diet-and-nutrition/chinese-green-tea-research.htm.