Agree with Lunk.
Dbol is hepatotoxic.
The longer you run it, the more damage will likely occur to your liver. Yes, you can run liver supports but that only helps - it doesn't prevent 100% toxicity/liver damage from Dbol. So, the longer you run it, the more damage you do.
Otherwise, if liver supports prevented 100% toxicity, some would run Dbol all the time.