Support healthy digestive system function with Rhubarb liquid extract from Herb Pharm. We prepare our Rhubarb Extract from the rhizome & root of Rheum palmatum plants which are Certified Organically Grown. To assure optimal extraction of Rhubarb's bioactive compounds, the rootstock is harvested in autumn or spring, is deprived of its outer bark and carefully slow-dried, and is then thoroughly extracted. Seek expert medical advice before taking during pregnancy or nursing. Not for use in intestinal obstruction, abdominal pain of unknown origin, intestinal inflammation or during menstruation. Not for use in excess of 8 consecutive days or in children less than 12 years old.