A randomized, double-blind, placebo-controlled study of effect of green tea on lifestyle-related disease prevention

INTERVENTION: Ten capsules of green tea powder, three times a day (6g/day), for 12 weeks. Ten placebo capsules, three times a day (6g/day), for 12 weeks. CONDITION: metabolic syndrome PRIMARY OUTCOME: 1) body weight; 2) HbA1c; 3) LDL‐cholesterol SECONDARY OUTCOME: 1) Blood pressure, fat percentage, waist, BMI; 2) FBS, insulin; 3) Serum total cholesterol, HDL‐cholesterol, triglycerides; 4) Serum amyloid protein A, high sensitive C_reactive protein; 5) Adiponectin, TNF‐alfa, urine 8‐OHdG INCLUSION CRITERIA: Is over 30 years old and under 75 years old and meets at least one of the followings; 1.BMI:23‐35Kg/m2 2.Waist circumference: 85cm or more in males and 90cm or more in females