Natural liver aid supplements work best when they are stacked with one and another as they work synergistically. Rather then just take milk thistle, I would take N2guard. N2guard from n2bm.com is loaded with 43 ingredients to support optimal organ and liver health while on cycle.
It contains a full dosage of TUDCA per serving. Do some research on TUDCA. It is by far the best liver aid supplement on the market to date. The reason most companies don't include it in their liver aid formulas is because it is very expensive. TUDCA - an amazing liver cure - Evolutionary.org