I would advise doing Liver Flushing for the first few years, until the liver is cleaned and healed. And then you shouldn't consume any fats ONLY if you are 100% fruit.
So during the first years of cleansing it's recommend to take lecithin and plant fats such as olive oil, sunflower, avacado, grape oil.
Tho fat (oil) free is only recommended if you really are a pure fruitarian.