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Green tea polyphenol boosted metabolism

To sustain life, the body converts digested food into energy. This conversion cycle is called metabolism. An efficient, well-regulated metabolism keeps the body in energy balance. If the body is not in energy balance, it will lose or gain weight. 

In this review, doctors analyzed eight placebo-controlled studies covering 268 people who took epigallocatechin gallate (EGCG), a powerful antioxidant polyphenol in green tea. Doses ranged from 300 mg to 800 mg per day, in studies lasting from two days to 12 weeks.

Overall, compared to placebo, people who took EGCG saw an increase in metabolic rate; meaning more efficient energy conversion. Discussing the findings, doctors said EGCG can increase the metabolic rate, even at doses as low as 300 mg per day.

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