It's a derivative of d-bol (chemicaly speaking anyhow). So....an edjucated guess would be that it rivals d-bol as far as toxicity is concerned. It's a 17-aa just like all the others. So YES.....it's hepatotoxic.
it's similar to dbol, but it's not really a dbol derivative ( all AS are structurally very closely related )
turinabol = clostebol, which is just Test with an attatched chlorine atom.........
oral tbol is the methylated form ( of clostebol )
It's hard to extrapolate toxicity from chemical structures.....but OT is a 17aa so it will be hepatotoxic.....the only sure way to find out exactly how toxic is to ask someone who's done it!
The other worry about tbol is that chlorine atom may convey some toxicity - just look at halo!
Having said all that.......I have heard from a couple of people that they had no probs with it / their liver......would be nice to get some more info tho......