The fats in the liver are apparently Triglycerides so other than sticking with the strictest rules of No sugar, No starch, no processed seed oils to drive them to very low levels, unsure how your diet could be much improved. But here is the general advice How to lower Trigs from an old thread, copied from Cholesterol Clarity book. http://forum.lowcarber.org/showthre...232#post9092232

https://www.mayoclinic.org/diseases...es/syc-20354567

One thing you didn’t mention but doctor should have tested for, is one of the viral hepatitis. It can be a "silent" and you both have NAFLD. Any travel to countries with less than ideal food and water sanitation?

Or a high use of NSAIDS? (See link to follow)

Milk thistle is often mentioned as a natural liver detox herb but unlikely there has been any study proving benefit. Here are more liver tips from the "natural" medicine world, no guarantee of benefit but some other advice to consider: https://www.peoplespharmacy.com/201...r-liver-enough/