I'd use Liv 52 when using orals as well but what a lot of people don't realize is that the ingredients have never been proven to do anything at all. It's all anecdotal folklore for the most part.
Milk Thistle and NAC are also known to help clense the liver but the ONLY thing that has been shown to actually regenerate liver cells is "Piroliv."
To my knowledge the only supplement that contains Pircoliv is this:
Post Cycle. Liver recovery agent, anti-catabolic and erectile enhancer. | EliteFitnessNutrition