Trial | Probiotics group | Control group | Length of treatment (days) |
---|---|---|---|
Oláh et al. [26] | 109Leuconostoc plantarum 299 per serving | 109 heat-inactivated L. plantarum 299 per serving | 7 |
 | Twice daily | Twice daily |  |
Li et al. [25] | 107Bifidobacterium longum, 106L. bulgaricus, and 106Streptococcus thermophilus per serving (Golden Bifid) | Water | 7 |
 | Thrice daily | Three times daily |  |
Oláh et al. [27] | 1010Pediococcus pentosaceus, 1010L. mesenteroides, 1010L. paracasei and 1010L. plantarum with bioactive fibers per serving (Synbiotic 2000 Forte; Medifarm, Kågeröd, Sweden) | Bioactive fibers | 7 |
 | Once daily | Once daily |  |
Besselink et al. [23] | L. acidophilus, L. casei, L. salivarius, L. lactis, B. bifidum and B. lactis in a totally daily dose of 1010 (Ecologic 641; Winclove Bio Industries, Amsterdam, the Netherlands) | Placebo | 28 |
 | Twice daily | Twice daily |  |
Plaudis et al. [28] | 1010P. pentosaceus, 1010L. mesenteroides, 1010L. paracasei and 1010L. plantarum with bioactive fibers per serving (Synbiotic 2000 Forte) | Bioactive fibers | Unclear |
 | Twice daily | Twice daily |  |
Cui et al. [24] | 4 × 107B. longum, 4 × 107L. bulgaricus and 4 × 107Enterococcus faecalis per serving | Water | 14 |
 | Twice daily | Twice daily |  |