This randomized, single-blind, placebo-controlled study evaluated among 70 women with acute uncomplicated cystitis the effects of daily supplementation during 3 days with 2000 mg of spray-dried aqueous extract of green tea or placebo (Starch) along with antibiotherapy (trimethoprim-sulfamethoxazole).

 

Women in the green tea group showed a decrease in the prevalence of cystitis symptoms compared to baseline, from 68% to 61% after 1 day, to 34% after 2 days and to 2% after 3 days. This prevalence of cystitis symptoms decrease is significantly higher in the green tea group than in the placeob group at all measurement point (all p < 0.01). Also a significant improvement in urinalysis results (abnormal urine color, pyuria, bacteruria, all p < 0.0001) were noted in the green tea group compared to the placebo group after 3 days of supplementation.

Authors concluded that green tea extract is efficient as adjunctive therapy for the management of cystitis symptoms in women with acute uncomplicated cystitis.

 

Kheirabadi Z, Mehrabani M, Sarafzadeh F, Dabaghzadeh F, Ahmadinia N. Green tea as an adjunctive therapy for treatment of acute uncomplicated cystitis in women: A randomized clinical trial. Complementary Therapies in Clinical Practice 34 (2019) 13–16