Support healthy respiratory system function with Osha root liquid extract from Herb Pharm. We prepare our Osha Extract from the roots of Ligusticum porteri plants which are Sustainably Wildcrafted in their wild high mountain habitat. To assure optimal extraction of Osha's bioactive compounds, the roots are hand-harvested only after the plants' seeds have fully matured, and are then carefully shade-dried and thoroughly extracted. Seek expert medical advice before taking during pregnancy.