Immuvit Cranberry Plus is a dietary supplement with cranberry, vitamin C, selenium and zinc that contributes to the normal functioning of the immune system for people suffering from urinary tract infections. Vitamin C, selenium and zinc contribute to the normal functioning of the immune system and the protection of cells from oxidative stress. Cranberries have been studied for urinary tract infections. They are a natural source of proanthocyanidins (PACs) that prevent the harmful action of free radicals, as well as the adhesion of pathogenic bacteria to the walls of the urinary tract. Contain: 500mg cranberry powder providing 36mg PAC. Proanthocyanidins prevent bacteria from adhering to the bladder walls.