From the Manufacturer's Label:
Oregon Grape (Mahonia aquifolium) is also known as Holly Mountain Grape or Creeping Barberry. Its root contains the alkaline Berberine used during the winter season.
Manufactured by Nature's Way.
About Puritan’s Pride
For more than 40 years, Puritan's Pride has helped families achieve a lifestyle of wellness. Our vitamins and supplements are made with care from the highest quality ingredients. They are tested or inspected as many as 15 times throughout the manufacturing process. That's why you can shop with confidence. We take pride in our products and helping customers feel their best.