A urinary tract infection (UTI) occurs when bacteria enter the urethra and travel up into your bladder. Any infection that enters the urinary tract should be treated early with a full course of antibiotics to avoid long-term damage and cost—UTIs can quickly become more serious kidney infections that may require a visit to the emergency room. About half of all women will experience a UTI during their lifetimes and as many as 20% of women experience recurrent UTIs—symptoms that seem to occur again and again. Many of these women find sex to be a consistent trigger, but D-Mannose can act as a powerful, science-backed preventative.