Table 1.

Characteristics of included studies.

No.	First author	Year	Location	Number (Intervnetion/Control)	Intervention	Control	Study design	Time	Dose	Health condition	Weight management
1	I-Ju Chen [18]	2016	China	77(39/38)	Green tea Extract capsules	Cellulose	Randomized double-blind control	12 weeks	857 mg EGCG	Health	No
2	Joanna Suliburska [19]	2012	Poland	46(23/23)	Green tea Extract capsules	Cellulose	Randomized double-blind control	3 months	208 mg EGCG	Health	No
3	Juan Mielgo-Ayuso [20]	2014	Spain	83(43/40)	Green tea Extract	Lactin	Randomized double-blind control	12 weeks	300 mg EGCG	Health	Yes
4	Chung-Hua Hsu [21]	2008	China	78(41/37)	Green tea Extract capsules	Cellulose	Randomized double-blind control	12 weeks	400 mg EGCG	Health	No
5	Justin D. Roberts [22]	2021	UK	18(9/9)	Green tea Extract	Cellulose	Randomized single blind control	8 weeks	400 mg EGCG	Health	Yes
6	Chung-Hua Hsu [23]	2011	China	68(35/33)	Green tea Extract	Cellulose	Randomized double-blind control	16 weeks	857 mg EGCG	Type 2 diabetes	No
7	K. Diepvens [24]	2006	Netherlands	46(23/23)	Green tea Extract	Cellulose	Randomized double-blind control	12 weeks	267 mg EGCG	Health	Yes
8	Joanna Bajerska [25]	2015	Poland	44(23/21)	Green tea extract additive	Blank	Randomized single blind control	12 weeks	242 mg EGCG	Health	Yes
9	Tengfei Zhang [26]	2020	China	24(12/12)	Green tea Extract	Cellulose	Randomized double-blind control	12 weeks	300 mg EGCG	Health	No
10	Pawel Bogdanski [27]	2012	Poland	56(28/28)	GTE capsules	Cellulose	Randomized double-blind control	3 months	208 mg EGCG	Hypertension	No
11	Lin-Huang Huang [28]	2018	China	73(37/36)	GTE capsules	Cellulose	Randomized, double-blind, cross-over control	6 weeks	857 mg EGCG	High LDL-c	No