Canine Immune System Support is a supplement that supports dogs' immune system function, endocrine health, and provides nutritional and biochemical support. Suggested Use: Administer orally. Best if given with food. Includes 1/2 tsp. or 1/8 tsp. scoop. 1-10 lbs 1/8 teaspoon once per day 11-20 lbs 1/8 teaspoon twice per day 21-40 lbs 1/4 teaspoon twice per day 41-60 lbs 1/2 teaspoon twice per day 61-80 lbs 3/4 teaspoon twice per day >80 lbs 1 teaspoon twice per day Nutrients & Ingredients: Each Serving Size (1/8 level teaspoon) contains: Dried yeast fermentate (EpiCor®) 33 mg, Zinc (from Zn amino acid (rice) chelate) 1mg, Vitamin E (Sunflower oil) 0.3 mg, Iodine (Kelp) 0.03 mg. Proprietary Blend: 202 mg: Bovine spleen, bovine spleen PMG™ extract, bovine thymus PMG™ extract, bovine thymus Cytosol™ extract, nutritional yeast, black currant (seed) oil, ashwagandha (Withania somnifera), organic reishi mushroom powder, organic shiitake mushroom powder, and eleuthero (Eleutherococcus senticosus). For animal use only. Keep out of the reach of children and animals. In case of accidental overdose, contact a health professional immediately.