PureDefense is a targeted blend of nutrients and plant extracts including Vitamin C, D and Zinc which contribute to the normal function of the immune system. Also providing n-acetylcysteine (NAC), EpiCor® dried yeast fermentate complex, Elderberry fruit extract and quercetin. Featuring 450 mg of NAC in each serving of two capsules. EpiCor® is a dried yeast fermentate complex that has undergone published clinical research. Provides 1000 IU (25 ug) vitamin D3 in each serving of two capsules. IngredientsN-acetyl-l-cysteine, ascorbic acid, EpiCor® dried yeast fermentate complex (from Saccharomyces cerevisiae), Elderberry extract, quercetin, zinc citrate, ascorbyl palmitate (antioxidant), cholecalciferol. Vegetarian capsule (hydroxypropyl methyl cellulose).Directions For UseAs a food supplement, take 2 capsules, twice daily, with meals, or as directed by a healthcare professional. PrecautionsIf you are pregnant or lactating, have any health condition or are taking any medication, consult your health professional before use. Use only if safety seal is intact. Food supplements should not be used as a substitute for a varied diet. Do not exceed the stated daily dosage. Keep out of the reach of young children.