... You DO need to check the amount of vit D3 in ur body through Blood test (takenn on empty stomach) !!
I Know fatty liver, one (if not the one) of the Main reason is NOT sufficient amount of vit D3 (!!!).
Usially doctors suggest ppl with this issue to take at least 5000iu of vit D3 a day (Adults). The best forms of vit d3 are either in Softgel form or Liquid form (in soft gel form Less not needed ingredients). NO tablet form (!).
Here is a link of my own post on FB when I used to be one of the admins of that page (posting Mainly) now I am off that page (so No advertising). Read this post. There you will also read about my Own experience with that and see the measurements of How Much of UI per day of it we need to take. It says for every 15 kg of body weight - 1000iu. I took That much (according to my body weight) and now my vit d3 level in Blood is Spot on. ;) :)
Anyhow, you Do need to take HIGH doses of vit d3 for Fixing it. Read my article anyway. :)