While the NAC is very beneficial for the liver, it is not even nearly to being enough for liver protection during an oral steroid cycle. You will need a more complete supplement. For instance, N2Guard has a lot of ingredients, including the TUDCA. The bes thing about such supplements, is that their ingredients work in synergy, so you get an enhanced effect of each ingredient. So you can't find a supplement that would be as complete as N2Guard.