Authorized Vendor for Immune Defense Tonic. IMMUNE DEFENSE TONIC Supports Healthy Function of the Immune System. The herbs used to prepare this compound are Certified Organically Grown without the use of chemical fertilizers, pesticides or herbicides, or they are Custom Wildcrafted in their natural wild habitat. Some of the herbs used are Traditional Chinese herbs and/or Traditionally Grown. They are hand-harvested at their optimal potency, and are then promptly extracted while still fresh & succulent or after being carefully shade-dried.