We have designed Respiratory Resilience to provide nutrients that support the function of the respiratory and immune systems: N-Acetyl Cysteine (NAC) derived from the amino acid l-cysteine, n-acetyl cysteine (NAC) offers a wide range of benefits:Support for respiratory healthSupport for lung healthSupport for healthy immune systemSupport for healthy levels of inflammationAntioxidant benefitsAmount Per Serving %DVVitamin C (Ascorbic Acid) 500 mg 556%Vitamin D (2,000 IU) 50 mcg 282%Zinc (Zinc Amino Acid Chelate) 50 mg 455%N-Acetyl Cysteine 600 mgQuercetin 400 mgBromelain (2000 GDU/g) 300 mgCordyceps Extract (Paecilomyces hepiali) (mycelia) 100 mgTurmeric root extract 100 mgDimethylglycine HCl (DMG) 80 mgDaily Value not established.Other Ingredientshydroxypropyl methylcellulose (vegetable capsule), l-leucine.DosageTake 4 vegetable capsules daily, or as directed by a health care professional.Not to be used by pregnant or lactating women.Count120 Capsules.