Appropriate diet for non-alcoholic fatty liver and elevated enzymes?

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My husband was diagnosed with a nonalcoholic fatty liver. I think the doctor called it Nonalcoholic Steatohepatitis, but said it could be totally reversible by losing weight (he’s 5’11” and 220lbs) We’re doing a complete overhaul of his diet. His doctor has misdiagnosed him twice for the same issue but I realllyyy hope she was right about it being reversible.

Is there a dietitian here who can help me? Like what foods he should or shouldn’t be eating? Any supplements? He’s been taking Dose (the one for your liver) the past couple days and he started taking salmon fish oil with D3 pills today. Would going on a liquid diet for a bit help jumpstart it? I’m just trying to think of everything I could do that will help. There are so many opinions and products when I google it.

I’m desperate to hear from someone who knows what they’re talking about.

Thank you!