Dr. Becker's BioNutrients Cranberry with D-Mannose - Cranberry Extract nutritionally supports a healthy bladder while D-Mannose attaches to bacteria preventing them from sticking to the walls of the urinary tract. BioNutrients Cranberry with D-Mannose combines 500mg of 50:1 cranberry concentrate with 1,000 mg of pure D-mannose. This powerful combination assures you maximum health benefit.