IFNA1 and chronic hepatitis C virus infection: Zn is also administered as an antioxidant adjuvant to IFN in patients with chronic hepatitis C. The combination treatment of IFN with antioxidants, including Zn [69,70,71] and N-acetylcysteine, sodium selenite, and vitamin E [72] had promising results in such patients, although a meta-analysis did not demonstrate the beneficial effects by administration of Zn [73].