I'm sorry you are experiencing the "joy" of elevated liver enzymes. I've got the t-shirt for that too only mine began right after my j pouch surgeries. I've since been diagnosed with PSC (Primary sclerosing cholangitis). According to a GI doctor I had from U of M, PSC is common in people who have had Ulcerative Colitis. Mine was confirmed from liver biopsies that were done. I also have had quite a few ultra-sounds on the liver to make sure the bile ducts are open. Every couple of years my GI also orders a MRI to look at the liver.
I have had two biopsies to check my liver. I don't think the first one was sedated because I remember having to lie still and felt pressure while they took the sample. The second one was sedated. Following the biopsies, I had to lie still for at least an hour. (That meant no getting up even for the bathroom.)
After I discovered my enzymes were high I started taking Milk Thistle. I use Nature's Bounty and take 250 mg 3 times a day with meals. Since then, I have had several lipid profiles done and my enzyme levels have been normal.
On a side note: Liver issues are nothing to take lightly. My brother actually died of PSC at the age of 31. I'm not telling you this to scare you, but to encourage you to take it easy on things that aggravate the liver like alcohol. Also catching it early can prevent additional damage to it.