Well, following a well formulated keto lifestyle is best. 70-80% fat, 15-20% protein, 5% or less total carbs. You might also want to go dairy and nut free for a couple weeks (2-4 weeks).
We have meal plans that make this really easy to do. Or just follow the recipes on this website.
For supplements, a bifido bacteria probiotic, magnesium glycinate, K2 and D3 (if D levels are below 50) are great for everyone. Anything else specific to your situation we would have to do a health assessment to know what your specific symptoms are. L-carnitine can help with energy and getting weight moving too.