Immune booster stimulates resistance to many acute illnesses and general immune responses. It helps stimulate white blood cells (WBC), T cells and killer cells and increases and strengthens the body's powers of resistance. It can be given when exposure to other birds such as shows, boarding and visits to the Vet. Contains: Oregon grape root, echinacea purpurea root/leaf/stem/ flower, black walnut hull, lemon peel, thyme leaf and liquid trace minerals in a kosher certified vegetable glycerine/purified water base. **Not for long term use. For best results use for 90 days maximum.