Support healthy function of the respiratory system with Horseradish liquid extract from Herb Pharm. We prepare our Horseradish Extract from the root of Armoracia rusticana plants which are Certified Organically Grown without the use of chemical fertilizers, pesticides or herbicides. To assure optimal extraction of Horseradish's bioactive compounds, the roots are hand-harvested only in late autumn or early spring, are carefully shade-dried, and are then thoroughly extracted.