Table I.

Characteristics of trials included in the meta-analysis of garlic on blood pressure in hypertensives (SBP ≥140 mmHg, DBP ≥90 mmHg at baseline).

Author/(Refs.), year	No. of subjects (garlic/control group)	Garlic type	Brand	Country of manufacture	Dosage (mg/day)	Dosage of active ingredient per day	Duration (weeks)	Garlic Baseline mean SBP/DBP (mmHg)	Control Baseline mean SBP/DBP (mmHg)
Kandziora et al (28), 1988	20/20	GP	Kwai	Germany	600	7.8 mg alliin	12	174/99	175/98
Auer et al (29), 1990	24/23	GP	Kwai	Germany	600	7.8 mg alliin	12	171/102	161/97
Vorberg and Schneider (30), 1990	20/20	GP	Kwai	Germany	900	11.7 mg alliin	16	144.5/91	144/88
Holzgartner et al (31), 1992	47/47	GP	Kwai	Germany	900	11.7 mg alliin	12	143/83	141/82
Santos and Gruenwald (32), 1993	25/27	GP	Kwai	Germany	900	11.7 mg alliin	24	143/89	144/89
Sobenin et al (33), 2008	23/19	GP	Allicor	Russia	600	7.8 mg allicin pt	12	143/89	140/88
Sobenin et al (34), 2009	G2: 18/20	GP	Allicor	Russia	2400	31.2 mg allicin	8	153/95	150/94
Ried et al (5), 2010	HT: 6/10	AGE	Kyolic High Potency	USA for Australia/NZ	960 (4 caps)	2.4 mg SAC	12	135/74	141/76
Ried et al (6), 2013	G2: 20/17	AGE	Kyolic High Potency	USA for Australia/NZ	480 (2 caps)	1.2 mg SAC	12	149/76	149/76
Nakasone et al (35), 2013	HT: 23/24	GPjpn	Dentou ninniku ranwo™	Japan	188	NR	12	HT: 142/91	HT: 142/92
Ried et al (7), 2016	HT: 38/26	AGE	Kyolic Reserve	USA	1200 (2 caps)	1.2 mg SAC	12	HT: 154/96	HT: 146/93
Ried et al (8), 2018	23/26	AGE	Kyolic Reserve	USA	1200 (2 caps)	1.2 mg SAC	12	153/93	144/90

AGE, aged garlic extract; GP, garlic powder; GP_jpn, Japanese garlic powder containing egg yolk; G2, main garlic group, P, placebo group; HT, hypertensive subgroup; RG, raw garlic; mg; milligram; mg/dl, milligram per decilitre; mmHg, millimetre of mercury; NA, not applicable; NR, not reported; NZ, New Zealand; pt, potential; SAC, S-allylcysteine; SBP/DBP, systolic/diastolic blood pressure.