Does anyone know anything about metabolic encephalopathy?

I have had an EEG and a quantitative EEG and each showed significant Theta waves in the temporal regions of my brain. I also had blood tests that showed elevated liver enzyme levels, which mean liver damage of some kind. Looking at Wikipedia it says that excess Theta waves are an indication of Metabolic Encephalopathy and when I look up metabolic encephalopathy on Google I found a site that says metabolic encephalopathy is caused by a problem with the liver where toxins build up in the blood and cause brain damage. I had a bunch of blood tests done and all they found were high cholesterol and the elevated liver enzymes. I had a hair ysis done and that showed very low levels of zinc and cobalt and slightly low levels of magnesium. I had so many different things tested in my blood I can't list them all here, but what are some things that should or could be tested for to determine if I have metabolic encephalopathy or what is going on?