Auvichayapat 2008.

Methods	This was a randomised, placebo‐controlled clinical trial with a treatment to control randomisation ratio of 1:1
Participants	INCLUSION CRITERIA: 40 to 60 years old (females postmenopausal > 1 year) BMI > 25 kg/m2 EXCLUSION CRITERIA: a history of: metabolic disease (e.g. diabetes mellitus, hyper‐ or hypothyroidism, Cushing's syndrome) systemic disease (e.g. heart, renal, liver disease) prescribed medications (e.g. antipsychotics, antidepressants, anti‐obesity medications, hormonal therapy) regular exercise or average total energy expenditure > 8373.6 kJ/day history of tea or caffeine hypersensitivity DIAGNOSTIC CRITERIA: height (measured using a wall‐mounted ruler) weight (measured using a digital scale before breakfast, after voiding, wearing a hospital gown) BMI (calculated from previous 2 measurements)
Interventions	NUMBER OF STUDY CENTRES: NR COUNTRY/ LOCATION: Thailand SETTING: NR TREATMENT BEFORE STUDY: unknown
Outcomes	OUTCOME(S) (as stated in the protocol/registered trial documents): PRIMARY OUTCOME(S): unknown SECONDARY OUTCOME(S): unknown OTHER OUTCOME(S): unknown
Study details	STUDY TERMINATED BEFORE REGULAR END: no
Publication details	This study was published in English in Physiology & Behavior, a peer‐reviewed journal, and was supported by the Invitation Research Fund of the Faculty of Medicine of Khon Kaen University, Thailand
Stated aim of study	Quote from study: "We therefore studied whether green tea reduces body weight in obese Thais"
Notes	BMI: body mass index; NR: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote from study: "the subjects were equally randomised into two groups, the green tea group and the placebo group" Comment: method of randomisation not reported
Allocation concealment (selection bias)	Unclear risk	Comment: not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Quote from study: "all subjects were blind to the aim of the study" "the subjects in the placebo group received cellulose capsules, which were indistinguishable from the green tea capsules" Comment: no mention of effectiveness of blinding efforts. No mention of whether researchers and staff were blinded to study components
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Comment: all outcomes on which the study reported were objective and measured by assessors. Therefore, whether or not assessors were blinded, risk of detection bias was assessed as low
Incomplete outcome data (attrition bias) All outcomes	Low risk	Comment: investigators specified enrolment details and explained that there was no attrition of participants
Selective reporting (reporting bias)	Low risk	Comment: outcomes specified at the beginning were adequately investigated and reported
Other bias	Low risk	Comment: appears to be free of other bias