Nature's Herbs Mexican Wild Yam is harvested from select farms and plantations in Mexico. Quality mature tubers (roots) reach their peak size in four to five years and are harvested during the winter to preserve their potency. Our exclusive FreshCare system inhibits normal plant oxidation, maintaining product potency and extending freshness. It includes all-natural antioxidants in each capsule, oxygen-absorbing packets in each bottle, special air-tight seals and amber glass packaging for uncompromised quality. Unconditional product guarantee: Nature's herbs unconditionally gu