From the Manufacturer:
Nature's Herbs premium Wild Country Dong Quai Root grows wild in the rich fertile meadows of China, Chinese women have relied on DongQuai for natural health-care for several thousand years. Today, it is used throughout the world with a reputation, perhaps, second only to that of Ginseng. 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.