liver longer, essentiale forte N, and liv 52 are all good choices.
liver longer is definitely the best, it's actually a drug not just a supplement, it is a derivative of ursodiol which is used medically to treat hepatic cholestasis (the particular brand of liver toxicity caused specifically by oral steroids)
then essentiale forte N, which also targets the specific type of toxicity caused by steroids.
liv 52 is good as well but i'm on the fence about how effective it is.
lecithin is good because it's cheap, works on hepatic cholestasis (by increasing bile flow) and is one of the primary ingredients in essentiale forte N.
so if you're broke and not too worried about it just go with soy lecithin.
if you've got the cash get liver longer.