The consumption of green tea did not decrease the levels of fasting plasma glucose , fasting serum insulin , OGTT-2 h glucose , haemoglobin A₁c and HOMA(IR ) in population s at risk of T2DM .
BACKGROUND Although the regular consumption of green tea or green tea extract has been considered to improve insulin sensitivity , the reported results are inconsistent .
Therefore , we conducted a meta- analysis to evaluate the effect of green tea or green tea extract on insulin sensitivity and glycaemic control in population s at risk of type 2 diabetes mellitus ( T2DM ) .
Green tea (Camellia sinensis) and cancer prevention: a systematic review of randomized trials and epidemiological studies
Background Green tea is one of the most popular beverages worldwide . This review summarizes the beneficial effects of green tea on cancer prevention . Methods Electronic data bases , including PubMed ( 1966–2008 ) , the Cochrane Library ( Issue 1 , 2008 ) and Chinese Biomedical Data base ( 1978–2008 ) with supplement of relevant websites , were search ed . There was no language restriction . The search es ended at March 2008 . We included r and omized and non-r and omized clinical trials , epidemiological studies ( cohort and case-control ) and a meta- analysis . We excluded case series , case reports , in vitro and animal studies . Outcomes were measured with estimation of relative risk , hazard or odd ratios , with 95 % confidence interval . Results Forty-three epidemiological studies , four r and omized trials and one meta- analysis were identified . The overall quality of these studies was evaluated as good or moderate . While some evidence suggests that green tea has beneficial effects on gastrointestinal cancers , the findings are not consistent . Conclusion Green tea may have beneficial effects on cancer prevention . Further studies such as large and long term cohort studies and clinical trials are warranted
The consumption of green tea did not decrease the levels of fasting plasma glucose , fasting serum insulin , OGTT-2 h glucose , haemoglobin A₁c and HOMA(IR ) in population s at risk of T2DM .
BACKGROUND Although the regular consumption of green tea or green tea extract has been considered to improve insulin sensitivity , the reported results are inconsistent .
Therefore , we conducted a meta- analysis to evaluate the effect of green tea or green tea extract on insulin sensitivity and glycaemic control in population s at risk of type 2 diabetes mellitus ( T2DM ) .