Immune Support: Kirkman Yeast Aid Advanced Formula Contains Our Proprietary Product Blend, Vitamin C, Biotin, Calcium, And Selenium To Help Support The Immune System And Yeast Levels In The Body Expert Formulation: Our Proprietary Blend Was Developed By Working Closely With Several Physicians And With The Guidance Of The Late Dr. William Crook, An Expert In Yeast Issues Safe For Daily Use: Take Two To Four Capsules Daily Or As Directed By A Physician Ultra Tested: Our Ultra Tested Standards Far Exceed Industry Standards And Government Requirements Hypoallergenic: Does Not Contain Gluten, Casein, Milk, Eggs, Peanuts, Tree Nut Allergens, Fish Allergens, Shellfish, Soy, Wheat, And Sesame