Could probiotics calm your bladder and your anxiety?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Aged between 18 and 80 years old (inclusive). 2. Able to understand study-related instructions and independently complete the required questionnaires. 3. Able to provide written informed consent and willing to comply with all study requirements, including completing diaries/questionnaires and refraining from taking any other probiotic or prebiotic supplements during the 3-month study period. 4. Meet the diagnostic criteria for Overactive Bladder (OAB) as defined by the International Continence Society (ICS) (urgency as the core symptom, with or without urgency urinary incontinence, frequency, and nocturia); have an Overactive Bladder Symptom Score (OABSS) ≥ 6; and have a daytime voiding frequency of ≥ 8 times. 5. Have a preliminary diagnosis of "Generalized Anxiety Disorder" or "Anxiety state" assessed by a psychiatrist or trained investigator according to DSM-5 or ICD-10 criteria, or have a Generalized Anxiety Disorder-7 (GAD-7) scale score ≥ 5. 6. If previously using any over-the-counter medications or other products for anxiety relief (e.g., magnesium, melatonin, anticholinergic drugs) or receiving psychotherapy, these must have been discontinued for at least 4 weeks prior to randomization and must remain completely discontinued throughout the entire study period. Exclusion Criteria: 1. Presence of organic diseases of the urinary system (e.g., urinary tract obstruction, tumors, stones, acute infection, interstitial cystitis, stress urinary incontinence). 2. Neurogenic bladder caused by neurological diseases or a history of pelvic surgery. 3. Use of antibiotics, probiotics, or prebiotics within the past 1 month prior to screening. 4. Any adjustment to medications used for treating OAB or anxiety within the past 2 weeks prior to screening. 5. Pregnant or lactating women, or individuals with a known allergy to any components of the study preparation. 6. Suffering from other severe psychiatric/psychological disorders or severe systemic diseases (e.g., uncontrolled diabetes mellitus, severe obesity).