Supports immune function and upper respiratory health. Your immune system provides essential protection from invasion by bacteria and viruses. Your system also plays a vital role in repairing damaged cells, tissues, and organs within the body. Your immune system relies on different types of immune cells to perform its functions properly. NK or natural killer cells form the immune systems' first line of defense. B-cells and T-cells respond a little later but they protect you for longer periods. There are certain compounds that can be used to promote and improve immune system response. EpiCor is produced from Saccharomyces cerevisiae. This compound helps to improve NK cell activation. EpiCor also supports and promotes B-cell and T-cell activity. The PureDefense with NAC supplement from Pure Encapsulations offers you a simple and convenient way to include EpiCor in your daily diet to help support and promote optimal immune system function. Suggested Use: Take 2 capsules, twice per day, with meals. Ingredients: Amount Per Serving Four vegetable capsules contain: Vitamin C (as ascorbic acid)500 mg. Vitamin D (as cholecalciferol) (D3)2,000 i.u. Zinc (as zinc citrate)15 mg N-Acetyl-l-cysteine (free-form)900 mg EpiCor dried yeast fermentate complex500 mg. (from Saccharomyces cerevisiae) European elder (elderberry) (sambucus nigra) extract400 mg. (fruit) Quercetin50 mg Ascorbyl palmitate (fat-soluble vitamin C)40 mg. Other ingredients: vegetarian capsule (cellulose, water) Warnings: If pregnant or lactating, consult your physician before taking this product Dietary Specifications: Wheat Free Dairy/ Milk Free Gluten-Free Soy Free Yeast Free Sugar-Free Starch Free Preservative Free Hydrogenated Oil-Free Corn Free Free of Artificial Colors/Flavors Delivery Type: Vegetarian Capsules Users: Not specified