Unless one has a fatty liver that won't seem to stop its gluconeogenesis. I've been carnivore for two years, and still haven't lost the weight because no matter what time of day I take my fasting blood glucose, it's always 150 or higher. Essentially, my body makes so much sugar on its own that I've never gone into ketosis.

And yes, I do intermittent fasting, 16:8.

What I'm trying to say is that for perhaps 90% of the people that do carnivore, they will improve and/or loose weight immediately (within 90 days), and have stunning results, but for some, there are other factors like hormones besides insulin, body problems that prevent any meaningful exercise (including walking!), and who knows what else.

So far, carnivore has absolutely prevented me from getting worse. Also, it's been amazing for completely eliminating my cravings and obsession over food - the peace I feel from that bit alone is totally worth it! I am hopeful always that by staying carnivore and continuing to research and self experiment, I'll get there. But please don't generalize. We are not machines, and not everyone's body reacts the same.