A Strong Immune System for Cats Dr. Harvey’s Emune-Boost for Cats is a proprietary blend of herbs mixed in a whole food base of spirulina, bee pollen, lecithin and nutritional yeast. Emune-Boost uses a powerful herbs that are known traditionally to help the bodies immune fighting abilities. These herbs are blended with whole food supplements that are filled with vitamins and minerals that will enhance your dog’s ability to fight disease. This formula has been used successfully for dogs that have had a weakened immune system due to surgery, illness, stress, grief or other trauma Our Ingredients Tell It All Bee Pollen, Spirulina, Lecithin, Nutritional Yeast, Garlic, Flax Seed Meal, Alfalfa Leaf, Kelp, Astragulus, Suma, Echinacea Angustifolia, Oregon Grape Root, Dandelion, Fo Ti, Ginkgo, Gotu Kola, Pau De Arco, Rosemary, Ginger, Thyme, Turmeric, Red Clover, Milk Thistle, Licorice Root