Granulated food supplement for the prophylaxis of urinary tract infections and aid in their antibiotic treatment. It includes in its formulation D-Mannose and PAC in effective amounts that complement their mechanism of action to prevent recurrences of urinary tract infections. In addition, it includes ursolic acid, zinc and vitamins A, C and E to improve the symptoms of the infection. The controlled-release galenic form of Manosar achieves effective and constant amounts of the components of the formulation in urine for 24 hours with a single daily intake, which favors patient adherence.