Beta-Sitosterol with Plant Sterol Esters help to improve immune function. They can help dogs and cats with viruses, autoimmune conditions, and other immune conditions like cancer. These are also helpful with allergies.  Supplement Facts Servings per Container: 90 Amount Per Serving CardioAid®-S Plant Sterol Esters(400 mg Beta-Sitosterol, plus Campesterol and Stigmasterol) 1 g (1000 mg) Natural Natural Fish Oil Concentrate 120 mg Other Ingredients: Softgel capsule (gelatin, glycerin, water, carob), and soy lecithin. Contains fish (sardines, anchovies, mackerel) and soy. Recommended Dosage: Dogs under 50lbs - 1 capsule daily Dogs above 50lbs - 1 capsule 2x daily