The science behind Urinary Wellness™: cranberry, D-mannose & botanicals

For scientific education only. This content is not a substitute for medical advice, diagnosis or treatment. Always consult a qualified healthcare professional before starting any supplement.

Urinary Wellness™ reflects evidence-led, non-antibiotic approaches to urinary-tract support. Five studies on cranberry, sage, rosemary and D-mannose are summarised below.

1. Stopping the First Step: Cranberry and Bacterial Adhesion

• Cranberries contain A-type proanthocyanidins that may hinder uropathogenic Escherichia coli attachment to urinary-tract surfaces.
• A meta-analysis of 23 trials involving 3,979 participants found an approximately 30% lower UTI incidence overall.
• Reported relative risk reductions were 32% in women with recurrent UTIs and 45% in susceptible children.
• A 51% reduction was reported among patients with indwelling catheters.
• Formulations, doses, treatment durations and participant characteristics differed considerably across the trials.
• Cranberry may support prevention in selected people but cannot treat an active infection or replace indicated antibiotics.

Reference: Xia JY, Yang C, Xu DF, Xia H, Yang LG, Sun GJ. Consumption of cranberry as adjuvant therapy for urinary tract infections in susceptible populations: a systematic review and meta-analysis with trial sequential analysis. PLoS One. 2021;16(9):e0256992. doi:10.1371/journal.pone.0256992

2. Beyond Antibiotics: Cranberry Bioactives and UTI Prevention

• Recurrent urinary infections and antimicrobial resistance have increased interest in supportive non-antibiotic strategies.
• Cranberry A-type proanthocyanidins may interfere with bacterial fimbriae and reduce E. coli adhesion to urinary-tract cells.
• Cranberry compounds may also influence bacterial motility, biofilm formation and microbial communication.
• By limiting adhesion and colonisation, these bioactives may help bacteria leave the urinary tract during urination.
• Clinical benefits vary with PAC content, formulation, dose, duration and individual response, highlighting a need for standardisation.
• Cranberry is preventive support only and should not replace medical assessment or antibiotics for an established infection.

Reference: Jangid H, Shidiki A, Kumar G. Cranberry bioactives in urinary tract infection prevention: mechanisms and clinical evidence. Front Nutr. 2025;12:1502720. doi:10.3389/fnut.2025.1502720

3. Sage in the Laboratory: Antibacterial Signals, Clinical Questions

• Salvia officinalis essential oil contains biologically active alcohols and phenolic compounds.
• Laboratory testing evaluated Moroccan sage oil against Gram-positive and Gram-negative bacterial species.
• The oil inhibited all tested organisms, although susceptibility differed between bacterial strains.
• Bactericidal activity was reported against Pseudomonas species and Enterococcus faecalis at the tested concentrations.
• Effects against Escherichia coli and Citrobacter freundii were mainly bacteriostatic, indicating growth inhibition.
• Because the evidence is in vitro, it does not establish safe dosing, clinical effectiveness or suitability for treating infection.

Reference: Lahlou Y, Fadli M, Hassani L, et al. Antibacterial activity of Salvia officinalis essential oil and its chemical fractions. Rocz Panstw Zakl Hig. 2023;74(4):459-468.

4. Plant–Antibiotic Interactions: Why Synergy Must Be Tested

• Researchers tested sage and rosemary extracts against 60 urinary Escherichia coli isolates.
• Minimum inhibitory concentrations were 32 µg/mL for sage and 64 µg/mL for rosemary.
• Both extracts increased the mean inhibition zone of ceftazidime from 17.50 mm to approximately 24.1 mm in vitro.
• Rosemary also enhanced ceftriaxone activity, but several other antibiotic combinations showed no improvement.
• Some combinations reduced bacterial susceptibility, demonstrating that herbal–antibiotic interactions are not uniformly beneficial.
• These laboratory findings do not establish patient benefit and do not support unsupervised combination with antibiotics.

Reference: Amirian F, Besharat M, Jafari F, et al. Antibacterial effects of Salvia officinalis and Rosmarinus officinalis extracts alone and in combination with antibiotics against urinary Escherichia coli isolates. Ann Mil Health Sci Res. 2017;15(4):e80148. doi:10.5812/amhsr.80148

5. D-Mannose and FimH: An Anti-Adhesion Route Under Study

• D-mannose is a naturally occurring sugar that can reach the urinary tract after oral intake.
• It may bind FimH adhesins on uropathogenic E. coli and reduce bacterial attachment to the bladder lining.
• A post-hoc analysis of a prospective, non-interventional study examined women with acute uncomplicated cystitis.
• Symptom improvement and cure with D-mannose alone appeared comparable to outcomes observed with antibiotics.
• Non-random treatment allocation and retrospective analysis prevent the study from establishing equivalent efficacy.
• Randomised trials are needed, and suspected UTI — especially with fever, flank pain or pregnancy — requires medical assessment.

Reference: Wagenlehner FME, Abramov-Sommariva D, Höller M, Steindl H, Naber KG. Non-antibiotic herbal therapy (BNO 1045) versus antibiotic therapy in women with acute lower uncomplicated urinary tract infection: a post-hoc analysis of a clinical study evaluating D-mannose. Antibiotics (Basel). 2022;11(3):314. doi:10.3390/antibiotics11030314