Table 1.
Search string used for this systematic review.
| PubMed |
| (1) Plant (1082807) |
| (2) Plant extract (188557) |
| (3) Tea (30664) |
| (4) Herbal products (7154) |
| (5) Natural products (637692) |
| (6) 1 OR 2 OR 3 OR 4 OR 5 (1547065) |
| (7) Phytotherapy (39254) |
| (8) Treatment (10562707) |
| (9) Remedy (10139) |
| (10) Natural therapy (155217) |
| (11) Herbal medicine (41337) |
| (12) 7 OR 8 OR 9 OR 10 OR 11 (10578745) |
| (13) Acne vulgaris (12303) |
| (14) Propionibacterium acnes (4976) |
| (15) 13 OR 14 (16271) |
| (16) 6 AND 12 AND 15 (732) |
| (17) 16 AND Humans AND English (362) |
|
|
| Web of Science |
| (1) Plant (4958255) |
| (2) Plant extract (463391) |
| (3) Tea (125509) |
| (4) Herbal products (43344) |
| (5) Natural products (350473) |
| (6) 1 OR 2 OR 3 OR 4 OR 5 (5283779) |
| (7) Phytotherapy (39811) |
| (8) Treatment (9089471) |
| (9) Remedy (64916) |
| (10) Natural therapy (206773) |
| (11) Herbal medicine (69546) |
| (12) 7 OR 8 OR 9 OR 10 OR 11 (9313410) |
| (13) Acne vulgaris (17168) |
| (14) Propionibacterium acnes (8498) |
| (15) 13 OR 14 (23700) |
| (16) 6 AND 12 AND 15 (569) |
| (17) 16 AND English (547) |
|
|
| Scopus |
| (1) Plant (2340371) |
| (2) Plant extract (271770) |
| (3) Tea (64489) |
| (4) Herbal products (16588) |
| (5) Natural products (191436) |
| (6) 1 OR 2 OR 3 OR 4 OR 5 (2547351) |
| (7) Phytotherapy (40878) |
| (8) Treatment (7537055) |
| (9) Remedy (60029) |
| (10) Natural therapy (73955) |
| (11) Herbal medicine (53492) |
| (12) 7 OR 8 OR 9 OR 10 OR 11 (7665338) |
| (13) Acne vulgaris (14914) |
| (14) Propionibacterium acnes (8158) |
| (15) 13 OR 14 (21527) |
| (16) 6 AND 12 AND 15 (362) |
| (17) 16 AND English (338) |