Supports: May support digestive, skin, and immune health Size: 2 oz. liquid Suggested Usage: 10 to 30 drops 3 times per day or as directed by your healthcare professional. Contains: Berberis vulgaris (root), Purified Water, Ethanol (25%). *Baryberry. National Center for Complementary and Integrative Health Website. Accessed at https://nccih.nih.gov/health/providers/digest/skinconditions-science on May 22, 2019. Zarei, A., Changizi-Ashtiyani, S., Taheri, S., & Ramezani, M. (2015). A quick overview on some aspects of endocrinological and therapeutic effects of Berberis vulgaris L. Avicenna journal of phytomedicine, 5(6), 485–497.