Our Cranberry Extract contains PACRAN the first and only cranberry extract standardized to 1.5% A-Type Proanthocyanidins (PAC s). These unique flavonoids have potent antioxidant characteristics. Cranberry Extract may support the maintenance of urinary tract health optimization of urinary tract health maintenance of stomach health and circulatory health. Emerald Labs is formulated and clinically validated by a well-respected licensed naturopathic medical doctor (N.M.D.) according to the highest standards of his medical practice. His expertise in nutrition herbal and vitamin therapies natural hormone replacement and integrative medicine has resulted in a professional line of clinical-potency formulas directly accessible to our consumers. Emerald Labs products are: Raw Whole-Food Based Formulas for Enhanced Absorption and Bioavailability. Formulated by Dr. Mark Stengler. Therapeutic Doses with Clinical Results. 100% Additive-Free ? No Magnesium Stearate. Gluten-Free Formulas. Purity Tested ? cGMP Cer