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The anti-obesity effects of green tea in human intervention and basic molecular studies

Abstract

Many researchers have reported that obesity is a major risk factor for diabetes, cardiovascular diseases, several forms of cancer (such as breast, colon and prostate), pulmonary, osteoarticular and metabolic diseases in the past decades. Recently, the hypolipidemic and anti-obesity effects of green tea in animals and humans have slowly become a hot topic in nutritional and food science research. This review will up-date the information of the anti-obesity effects of green tea in human intervention and animal studies. During recent years, an increasing number of clinical trials have confirmed the beneficial effects of green tea on obesity. However, the optimal dose has not yet been established owing to the very different results from studies with a similar design, which may be caused by differences in the extent of obesity, dietary intake, physical activity intensity, the strength of subjects’ compliance to test instruction, the genetic background of populations, body composition and dietary habits. Therefore, further investigations on a larger scale and with longer periods of observation and tighter controls are needed to define optimal doses in subjects with varying degrees of metabolic risk factors and to determine differences in beneficial effects among diverse populations. Moreover, data from laboratory studies have shown that green tea has important roles in fat metabolism by reducing food intake, interrupting lipid emulsification and absorption, suppressing adipogenesis and lipid synthesis and increasing energy expenditure via thermogenesis, fat oxidation and fecal lipid excretion. However, the exact molecular mechanisms remain elusive.

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Acknowledgements

This work was supported by the Agricultural Science and Technology Achievements Transformation Project (2013GB2C300220, the Ministry of Science and Technology of People's Republic of China), the Earmarked Fund for Modern Agro-industry Technology Research System in Tea Industry (nycytx-26, the Ministry of Agriculture of People's Republic of China), the Program for Changjiang Scholars and Innovative Research Team in University (Grant no. IRT1101) and international cooperation projects (2011DFG33280, the Ministry of Science and Technology of People's Republic of China)).

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Huang, J., Wang, Y., Xie, Z. et al. The anti-obesity effects of green tea in human intervention and basic molecular studies. Eur J Clin Nutr 68, 1075–1087 (2014). https://doi.org/10.1038/ejcn.2014.143

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