Low Carb High Fat), though I don't push it to an extreme, and I'm feeling great.
I've tried LCHF in the past, but it was too extreme for me and I stopped. It was simply impossible to make it work in my life. Now I'm back and I do as I want to. I don't need to keep the carbs under 5%, I don't have to seat a lot of fat. The important thing is that it works and shows results.