UT Defense from Nature's Blend is a three- pronged approach to urinary tract health. It features PACs (proanthocyanidins) from cranberry extract, cranberry fruit powder and D-mannose. Powerful antioxidants, PACs deliver the beneficial compounds found in cranberry juice without the worry of added sugars. Limited scientific evidence shows that consuming 500 mg of a cranberry supplement daily may reduce recurrence of urinary tract infections.