Talk to Internal Medicine on ALT And AST Are Very High

I took some tests today. Every other test seems fine except for the Liver Function Test and Vitamin D Test. Can anyone suggest to me the cause of these? I'm above 100kg. Whenever I eat, my belly feels bloated. Gas gets built up in my stomach, and everyone notices my bloated belly. I also take a 30 - to 40 minute walk every day, but there is no use of it