Vitamin E:
At the end of the study period, alanine aminotransferase (ALT) normalization was observed in patients in vitamin E group. Vitamin E supplementation might be effective in the treatment of chronic hepatitis B.
Antiviral Res. 2001 Feb;49(2):75-81.

Vitamin C and E:
Supplementation of alpha-tocopherol and ascorbic acid attenuates the ribavirin-induced decrease of EPA in erythrocyte membrane phospholipids in chronic hepatitis C patients.
J Gastroenterol Hepatol. 2006 Aug; 21(8):1269-75.

Zinc:
Zinc supplementation improved the long-term outcome in C-viral CH and LC patients.
J Clin Biochem Nutr. 2009 Nov;45(3):292-303