Supports: May support urinary and digestive health* Size: 2 oz liquid Suggested Usage: 10 to 30 drops 3 times per day or as directed by your healthcare professional. Contains: Hydrastis Canadensis (root), Purified Water, Ethanol (25%). Ettefagh, K. A., Burns, J. T., Junio, H. A., Kaatz, G. W., & Cech, N. B. (2011). Goldenseal (Hydrastis canadensis L.) extracts synergistically enhance the antibacterial activity of berberine via efflux pump inhibition. Planta medica, 77(8), 835–840. doi:10.1055/s-0030-1250606 Prem K. Gupta, Gary Barone, Bill J. Gurley, E. Kim Fifer and Howard P. Hendrickson. (2015). Drug Metabolism and Disposition. April 1, 2015,43 (4) 534-552; DOI: https://doi.org/10.1124/dmd.114.059410