Bulking Agent (Microcrystalline Cellulose), Cranberry 150:1 Extract (50% Proanthocyanidins), Vitamin C (Ascorbic Acid), Anti-Caking Agent (Magnesium Stearate), Vitamin D3 (Cholecalciferol). Cranberry extract is said to support a healthy urinary tract, while the added Vitamin C and D further contribute to your overall health and immunity.