Characteristic Study ID	Intervention(s) and control(s)	Primarya end point(s)	Secondarya end point(s)	Otherb end point(s)
Auvichayapat 2008	I1:   green tea extract C1: placebo	‐	‐	Average left capsule (%) Blood pressure BMI Body fat % Diastolic blood pressure Food intake Heart rate Height Hip circumference Leptin Physical activity Respiratory quotient Resting energy expenditure Satiety Systolic blood pressure Substrate oxidation Urine vanillylmandelic acid Waist circumference Waist‐to‐hip ratio Weight
Diepvens 2005	I1: green tea C1: placebo	‐	‐	Appetite ratings Attitudes towards eating BMI Body fat % Caffeine intake Carbohydrate oxidation Cognitive restraint Diastolic blood pressure Disinhibition Eating behaviour (restrained/unrestrained) Emotional eating Energy expenditure Fat free mass Fat mass Fat oxidation Heart rate Height Hip circumference Hunger Mood Respiratory quotient (post‐absorptive) Respiratory quotient (post‐prandial) Resting energy expenditure Systolic blood pressure Tolerance of treatment Total body water Waist circumference Waist‐to‐hip ratio Weight
Hill 2007	I1: green tea extract C1: placebo	‐	‐	Abdominal fat Adipocytokines Adiponectin Blood lipids Blood pressure (resting) BMI Body composition Body fat mass Body fat percentage Body lean mass Diastolic blood pressure Direct glyceryl trinitrate‐induced vasodilation Endothelium‐dependent flow‐mediated dilation Energy expenditure Energy intake Flow‐mediated dilation Follicle stimulating hormone Fructosamine Glucose Glyceryl trinitrate‐mediated dilation Haematology Heart rate Height Hip circumference Insulin Intra‐abdominal adipose tissue Large artery compliance Leptin Liver function Serum electrolytes Small artery compliance Subcutaneous adipose tissue Systolic blood pressure Total body fat Visceral fat area Waist circumference Waist‐to‐hip ratio Weight
Hsu 2008	I1: green tea extract C1:  placebo	Note: "The outcome was evaluated as % reduction in BW, BMI and WC after 12 weeks of intervention" The word "primary" was not used	‐	Adiponectin Aminotransferase alanine Aminotransferases aspartate Blood sugar BMI Cholesterol Creatinine Ghrelin Glucose HDL‐cholesterol Height Hip circumference HOMA insulin resistance index Insulin LDL‐cholesterol Leptin Triglyceride Uric acid Waist circumference Weight
Hursel 2009	I1: green tea‐caffeine mixture + AP diet I2: green tea‐caffeine mixture + HP diet C1: placebo + AP diet C2: placebo + HP diet	‐	‐	Attitudes towards eating Beta‐hydroxybutyrate BMI Body fat distribution Fat free mass Fat mass Free fatty acid concentrations Glucose Glycerol concentrations Height Hunger Insulin Leptin Physical activity level Post‐absorptive appetite profile *(VAS ) Respiratory quotient Resting energy expenditure Satiety Substrate oxidation Total body water Total energy expenditure Triacylglycerol Waist circumference Weight
Kajimoto 2005	I1: catechin drink – low dose group I2: catechin drink – high dose group C1: placebo drink	‐	‐	Adverse events Alanine aminotransferase Albumin Alcohol intake Alkaline phosphatase Amylase Aspartate aminotransferase BMI Calcium Carbohydrate intake Chloride Chlorine Cholesterol intake Cholinesterase Creatinine Creatinine phosphokinase Dietary fibre intake Direct bilirubins Energy intake Erythrocytes Fasting glucose level Fat intake Ferritin Gamma‐glutamyl transpeptidase Glucose Glycated haemoglobin HDL‐cholesterol Height Haematocrit Haemoglobin Hip circumference Inorganic Phosphate Insulin Iron Ketone body fractions Lactate dehydrogenase LDL‐cholesterol Leukocytes Magnesium Physical activity levels Platelet counts Potassium Protein intake Sodium Subcutaneous fat area Total bilirubins Total cholesterol Total fat area Total proteins Triacylglycerol Unsaturated iron binding capacity Urea nitrogen Uric acid Visceral fat area (VFA) Waist circumference Waist‐to‐hip ratio Weight
Kataoka 2004	I1: catechin beverage 278 mg I2: catechin beverage 570 mg I3: catechin beverage 845 mg C1: control beverage	‐	‐	Abdominal fat area Albumin Alkaline phosphatase Blood sugar Blood urea nitrogen BMI Body fat ratio Calcium Chloride Creatinine Energy intake Fat intake Free fatty acid Gamma‐glutamyl transpeptidase GOT GPT HDL cholesterol Height Haematocrit Haemoglobin Hip circumference Inorganic phosphate Iron Lactate dehydrogenase LDL cholesterol Magnesium Number of steps Platelet count Potassium Red blood cell count Sodium Subcutaneous fat area Total cholesterol Total fat area Total plasminogen activator inhibitor‐1 Total protein Triacylglycerol Uric acid Visceral fat area Waist circumference Weight White blood cell count
Kovacs 2004	I1: green tea C1: placebo	‐	‐	Adverse events Attitude towards eating Beta‐hydroxybutyrate BMI Body fat % Caffeine intake Cognitive restraint Disinhibition Fat free mass Fat mass Frequency of previous dieting Glucose Glycerol concentrations Height Hip circumference Hunger Insulin Leptin Non‐esterified fatty acids Physical activity level Post‐absorptive appetite profile Respiratory quotient Resting energy expenditure Satiety Substrate oxidation Total body water Total energy expenditure Triacylglycerol Waist circumference Waist‐to‐hip ratio Weight
Kozuma 2005	I1: catechin beverage C1: placebo beverage	‐	‐	Acetoacetic acid Alanine aminotransferase Albumin Alkaline phosphatase Aspartate aminotransferase Beta‐hydroxybutyric acid Blood sugar Blood urea nitrogen BMI Body fat Calcium Chloride Creatinine Diastolic blood pressure Fasting blood sugar Gamma‐glutamyl transpeptidase HDL‐cholesterol Height Haematocrit Haemoglobin Hip circumference Inorganic phosphate Iron Lactate dehydrogenase LDL cholesterol Magnesium Non‐esterfied fatty acid Platelet counts Potassium Pulse rate Red blood cells Remnant lipoprotein cholesterol Sodium Subcutaneous fat area Systolic blood pressure Total cholesterol Total fat area Total proteins Triglycerides Uric acid Urine ketone bodies Urine protein Urine sugar Urine urobilinogen Visceral fat area Waist circumference Weight White blood cells
Maki  2009	I1: green tea beverage C1: control beverage	‐	‐	Abdominal fat areas Beta‐hydroxybutyrate Blood pressure Body composition Caffeine intake Insulin (fasting) Free fatty acids Glucose (fasting) High‐sensitivity C‐reactive protein (hs‐CRP) Intra‐abdominal fat area MDA (plasma concentration) Maximal treadmill exercise testing Metabolic equivalent hours (MET‐hours) Pedometer readings Plasma high‐sensitivity C‐reactive protein (hs‐CRP) Serum FFA Serum HDL‐cholesterol Serum LDL‐cholesterol Serum lipids Serum total‐C concentrations Subcutaneous fat area Total fat mass Triglyceride concentrations Waist circumference Weight Whole blood glycosylated haemoglobin
Nagao 2007	I1: brewed green tea beverage with added catechins C1: brewed green tea beverage with no added catechins	‐	‐	Abdominal fat level Alkaline phosphatase BMI Body fat mass Body fat ratio Caffeine intake from tea and coffee Coffee intake Computed tomography scan Diastolic blood pressure Energy intake based on food intake Fat energy ratio Fat intake Free fatty acids Gamma glutamyl transferase Gamma glutamyl transpeptidase Glucose Glutamic‐oxaloacetic transaminase Glutamic‐pyruvic transaminase HDL cholesterol Height Haematocrit values Haemoglobin Hip circumference Lactate dehydrogenase LDL cholesterol Lean body mass Platelets Pulse rate Red blood cell count Serum triacylglycerol Subcutaneous fat area Systolic blood pressure Tannin intake from tea and coffee Tea intake Total cholesterol Total fat area Visceral fat area Waist circumference Weight White blood cell count
Suzuki 2009	I1: tea catechin C1: placebo	‐	‐	Abdominal fat area Alcohol intake BMI Energy intake HDL cholesterol Height Hip circumference LDL cholesterol Number of steps Observable symptoms Patient complaints Remnant lipoprotein cholesterol Small dense LDL Subcutaneous fat area Total cholesterol Total fat area Triglycerides Visceral fat area Waist circumference Weight
Takase 2008	I1: catechin beverage C1: placebo beverage	‐	‐	Acetic acid Albumin Alkaline phosphatase Aspartate aminotransferase Beta‐hydroxybutyric acid BMI Calcium Calories Carbohydrate (% of energy) Chlorine Cholesterol (total) Creatine Diastolic blood pressure Energy intake based on food intake Fasting blood sugar Fat intake Fibre Free fatty acids Gamma‐glutamyl transpeptidase HDL cholesterol Height Haematocrit values Haemoglobin Hip circumference Inorganic phosphate Insulin Iron ketone bodies (total) Lactate dehydrogenase LDL cholesterol Magnesium Neutral fats Nutritional content of food intake Platelets Potassium  protein (total) Protein intake Red blood cell count Sodium Subcutaneous fat area Systolic blood pressure Total fat area Triglycerides Urea nitrogen Uric acid Urine glucose Urine ketones Urine protein Urobilinogen Visceral fat area Waist circumference Weight White blood cell count
Takashima 2004	I1: catechin beverage C1: control beverage	‐	‐	Abdominal fat area Blood sugar BMI Body fat ratio Carbohydrate oxidation CO2 consumption Energy expenditure Exercise tolerance Fat free mass Fat oxidation Free fatty acid Height Haematocrit Haemoglobin Hip circumference Insulin Ketone body Lactic acid Number of daily steps Oxygen consumption Red blood cell count Respiratory exchange ratio Respiratory quotient Resting energy expenditure Subcutaneous fat area Total energy expenditure Total fat area Visceral fat area Waist circumference Weight
Takeshita 2008	I1: catechin beverage C1: placebo beverage	Note: "Measurement of the key factor of interest, the amount of abdominal fat (area of abdominal fat), occurred at the beginning of the study (baseline) and at its completion (the 12th week)" The word “primary” was not used	‐	Abdominal fat Alanine aminotransferase Albumin Alcohol intake (g/d) Alkaline phosphatase Aspartate aminotransferase Blood pressure Blood urea nitrogen BMI Body fat mass Body fat ratio Calcium Carbohydrate (% of energy) Chlorine Cholesterol Coffee intake (mg caffeine/d) Coffee intake (mL/d) Creatinine Diastolic blood pressure Dietary fibre (g/d) Dietary intake Energy (kcal/d) Fat (% of energy) Free fatty acids Gamma‐glutamyltranspeptidase Glucose Height Haematocrit Haemoglobin HDL‐cholesterol Hip circumference Inorganic phosphate Insulin Intake of beverage Iron How they were feeling Ketone bodies Lactate dehydrogenase LDL cholesterol Lean body mass Magnesium Neutral fat Pedometer steps (steps/d) Plasma glucose Platelets Potassium Protein (% of energy) Pulse rate Red blood cells Safety parameters Side effects Sodium State of health Subcutaneous fat area Systolic blood pressure Tannin intake from coffee (mg/d) Total cholesterol Total fat area Triacylglycerol Unsaturated iron‐binding capacity Uric acid Urine ketone bodies Urea nitrogen Urine protein Urine sediment Urine sugar Urine urobilinogen Visceral fat area Waist circumference Weight White blood cells
Tsuchida 2010	I1: catechin beverage C1: control beverage	‐	‐	Albumin Alkaline phosphatase Blood sugar Body fat mass Body fat ratio BMI Calcium Chloride Creatinine Diastolic blood pressure Energy intake Fat energy ratio Fat intake Free fatty acids Gamma‐glutamyl transpeptidase Glucose GOT GPT HDL‐cholesterol Heart rate Height Haematocrit Haemoglobin Hip circumference Inorganic phosphate Iron Ketone bodies Lactate dehydrogenase LDL cholesterol Lean body mass Magnesium Phospholipids Platelet counts Potassium Protein Red blood cells Sodium Subcutaneous fat area Systolic blood pressure Total cholesterol Total fat area Total plasminogen activity inhibitor‐1 Total protein Triglyceride Urea nitrogen Uric acid Urine glucose Urine ketone bodies Urine protein Urine urobilinogen Visceral fat area Waist circumference Waist‐to‐hip ratio Weight White blood cells
Wang 2010	I1: GT1 I2: GT2 I3: GT3 C1: C	Note: “The response variable of main interest was body weight.” The word "primary was not used.	‐	Alanine aminotransferase Alkaline phosphatase Aspartate aminotransferase Blood glucose BMI Body fat % Dietary habits Energy intake Fat mass Gamma‐glutamyltransferase Glucose HDL cholesterol Height Hip circumference Intra‐abdominal fat Lactate dehydrogenase LDL cholesterol Lean mass Lifestyle habits Product liking Sagittal diameter Self‐perceived health status Total cholesterol Triglycerides Waist circumference Weight Whole body fat mass
Westerterp‐ Plantenga 2005	I1: green tea‐caffeine capsule ‐ low habitual caffeine consumers I2: green tea‐caffeine capsule ‐ high habitual caffeine consumers C1: placebo ‐ low habitual caffeine consumers C2: placebo ‐ high habitual caffeine consumers	‐	‐	adverse effects Attitude towards eating Beta‐hydroxybutyrate BMI Body fat % Caffeine intake Cognitive restraint Disinhibition Fat distribution Fat free mass Fat mass Free fatty acids Frequency of previous dieting Glucose Glycerol Height Hunger Insulin Leptin Physical activity level Respiratory quotient Resting energy expenditure Satiety Substrate oxidation Total body water Total energy expenditure Triacylglycerol Triglycerides Waist circumference Weight
Footnotes "‐" denotes not reported aAs stated in the publication bNot stated as primary or secondary end point(s) in the publication AP: adequate protein; BMI: body mass index; CO2: carbon dioxide; C: control; GOT: glutamic oxalacetic transaminase; GPT: glutamic‐pyruvic transaminase; GT: green tea; HP: high protein; HOMA: homeostasis model assessment; I: intervention; VAS: visual analogue scale