Promote healthy immune system to help maintain respiratory health and skin condition in dogs. Work naturally by helping block chemical reactions caused by wheat, corn, grass, and seasonal weather and humidity changes. Each chewable contains 50 mg vitamin C, 10 mg quercetin, 10 mg omega-3 EFA, 5 mg citrus bioflavonoids, 5 mg green tea extract, 2,000 IU pantothenic acid and 40 IU vitamin E.