TUDCA is the over-the-counter version of UDCA. They added a touring molecule to the USA so it no longer was just like the prescription version. Just that he's have shown it's actually slightly better. It is a powerful liver support. I take it whenever I am taking something that's very stressful on the liver, such as any oral AAS.
NAC is also an over the counter drug. It contains the precursors to glutathione so your body has all the raw materials and needs to make as much glutathione as a wants. I take 600 mg a day of hit to offset the damage I did to my liver through excessive drinking for decades.
Glutathione is a very powerful antioxidant. It can also help your liver to regenerate and help it to cleanse itself. It's really the cat's meow. The best way to take it is intravenously, and hospitals have been doing that for decades. The second best way to take it is through an intramuscular injection. It is basically worthless in an oral form.
This is the first study I've seen that talked about any damage at all. It implies that damage is only done in the presence of other liver damaging items. So in other words, if you are drinking and you take gw50 then it will increase the amount of scarring the drinking does. If you're not taking anything that does damage to the liver then gw50 does no damage. In other words, it seems to accentuate the damaging power of whatever else you are taking that causes liver damage. Taking NAC and TUDCA should be enough to stop any significant amount of damage.