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 ) .
Standardized capsule of Camellia sinensis lowers cardiovascular risk factors in a randomized, double-blind, placebo-controlled study.
OBJECTIVE Previous studies examining the effect of tea drinking on cardiovascular health have produced mixed results due to their observational nature and qualitatively and quantitatively imprecise definitions of active tea components . The objective of this study was to determine if a st and ardized and defined decaffeinated green tea ( Camellia sinensis ) product lowers blood pressure , serum lipids , oxidative stress , and markers of chronic inflammation . METHODS A r and omized , double-blind , placebo-controlled , parallel study on 111 healthy adult volunteers 21 - 70 y old was performed . We administered a st and ardized capsule of Camellia sinensis compounds ( CSC ) twice a day . Before and after 3 wk , blood pressure , serum lipids , serum amyloid-alpha ( a marker of chronic inflammation ) , and serum malondialdehyde ( a marker of oxidative stress ) were measured . RESULTS After 3 wk , CSC lowered systolic and diastolic blood pressures by 5 and 4 mmHg , respectively . After 3 mo , systolic blood pressure remained significantly lower . CSC  lowered serum amyloid-alpha by 42 % and lowered malondialdehyde by 11.9 % . In men , there were 10- and 9-mg/dL reductions in total and low-density lipoprotein ( LDL ) cholesterol , respectively . In all subjects with a baseline LDL cholesterol level > 99 mg/dL , there was 9 mg/dL lowering of total and LDL cholesterol . Adverse effects were mild and few and not different from placebo . CONCLUSION CSC was effective for decreasing , in as quickly as 3 wk , blood pressure , LDL cholesterol , oxidative stress , and a marker of chronic inflammation , all independent cardiovascular risk factors
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 ) .