NOW® Clinical Strength Standardized Cranberry contains powerful compounds called Proanthocyanidins (OPCs) that support healthy urinary tract function by preventing bacteria from adhering to the bladder lining, creating a hostile environment for bacterial growth and infection. The addition of Grape Seed Extract boosts the OPC content of this Clinical Strength formula. NOW® has also included Uva-Ursi Extract (Arctostaphylos uva-ursi), standardized to 20% Arbutin, a compound that destabilizes bacterial membranes. Serving Size: 3 Vcaps® Servings Per Container: 30 Calories 6 Total Carbohydrates 1.5 g Dietary Fiber 0.5 g 2% Sugars 0.5 g Cranberry (Vaccinium macrocarpon) (Fruit) 1.0 g (1,000) mg (Standardized to min. 6% Quinic Acid and min. 7% OPC's) Uva Ursi (Arctostaphylos uva-ursi) (Leaf) 300 mg (Standardized to min. 20% Arbutin) Grape Seed (Vitis vinifera) 45 mg (Standardized to min. 90% Total Polyphenols)