Food supplement based on D-mannose, plant extracts and Vitamin C Fepa Cystil from Fepadiet is a food supplement that helps improve the symptoms of urinary infections. Cranberry inhibits the adhesion of infectious microorganisms to the walls of the urinary tract. D-mannose, a sugar that we cannot assimilate, sticks to these walls, attracts bacteria and they are removed together in the urine. Bearberry is a urinary antiseptic. How to use: Take 1 sachet (5g) dissolved in 200 ml of water once a day.