My point is that there is no vitamin that is been definitively proven to help 'rejuvenate' your liver faster.
Although there are many claims by many companies that make vitamins but there is no definitive evidence for their use.
If your liver function tests are normal i.e. if your bilirubin, ALT, AST, GGT are all normal this means your liver is functioning fine in spite of the surgery, therefore there is nothing that you need to avoid or take.
Here is a link that you can read for yourself which mentions various vitamins and minerals and the evidence, if any, for their use:
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Let me know if you have more questions.