Table 1.

Characteristics of the included studies

Author	Year	Region of study	Study design	Age (year)a	Male/ female	Number of participants	Detail of intervention and comparator	Outcome measurementa	Timepoint for outcome measurement
Al-Dujaili E. A. S	2016	Jordan	Crossover placebo-controlled trial	24.6 ± 3.3	7/9	16	Intervention Chlorogenic acid 500 mg per day Comparator • Placebo	Body weight (kg) Intervention group • 72.16 ± 16.53 (at day 0) • 71.64 ± 16.35 (1 week later) Comparator group • 72.16 ± 16.53 (at day 0) • 72.10 ± 16.45 (1 week later)	1 week after baseline
Shahmohammadi H. A	2017	Iran	Randomized controlled trial	42.93 ± 6.5	22/22	44	Intervention • Green coffee bean extract capsule 500 mg (contain 250 mg of chlorogenic acid) take 1 capsule before breakfast and lunch Comparator • Placebo	Body weight (kg) Intervention group • 88.81 ± 6.73 (at day 0) • 85.68 ± 5.73 (8 weeks later) Comparator group • 90.25 ± 6.99 (at day 0) • 88.60 ± 6.69 (8 weeks later)	8 weeks after baseline
Roshan H	2018	Iran	Randomized controlled trial	52.36 ± 9.3	10/33	43	Intervention • Green coffee bean extract 400 mg twice per day (800 mg per day) Comparator • Placebo	Body weight (kg) Intervention group • 78.10 ± 11.01 (at day 0) • 76.01 ± 10.52 (8 weeks later) Comparator group • 80.11 ± 12.45 (at day 0) • 79.18 ± 12.75 (8 weeks later)	8 weeks after baseline

^aMean (± SD). mg milligram, kg kilogram