Can any dietician suggest a highly nutritios food as i am feeling week?

i am 65 yr old and after taking treament for hep c virus for 6 months.doc asked me to stop treatment after seeing sufferings .mine is ginotype b1 and the quatity has drastically come down from 15lakhs to mere 20.as i am feeling very week i would like to take nutritious food and good medicines like ginseng or vitamins. pl suggest remedies to my suffering.