since saturated fats come with other problems themselves.

I would love to know what those problems are, from my reading of the literature the vilification of saturated fat was misattributed (i.e. the damage sugar and carbs caused got blamed on saturated fats in the lipid heart hypothesis)

new research and guidelines. To that end, I’d recommend checking out if that is indeed true, and if the new recommendations/consensus would make my point moot.

There isn't much consensus, but the tide is turning - https://hackertalks.com/post/17259951

As far as I’m aware, fiber is a critical component of our gut health but also immune system robustness.

From my reading we don't know much about the gut and fiber, we are just at the beginning of our understanding. So there are lots of assumptions that may not apply. For instance, and most relevant to the couple eating a animal based diet for seizures, fiber is not necessary for gut health - right now most papers assume a diversity of biotics in the gut are the most healthy... and the assumption is that fibre increases this diversity.. which is true in a carbohydrate eating population. But in people only eating animal based foods we have case studies showing a very diverse gut... given the state of literature the assumption that fibre is essential hasn't been demonstrated, especially in a ketogenic metabolism. One of the major benefits of fibre in a carbohydrate rich gut is providing BHB locally to the gut lining, which has major benefits, but in a ketogenic metabolism BHB is being generated constantly in the liver and gets all over the body including the gut (and also the brain).

I was given the rough guide of overall carbs - fibers = “final” carbs ingested. Not really sure how to translate that into English but I think it’s a common rule of thumb and you get the gist. Has that changed since?

That is still true, fibre is indigestible by the human gut, its the bacteria that break some of it down into SCAs which then get absorbed. Fibre does not spike glucose, however, it does block the absorption of other healthy food you eat in the same window.... Again from my reading fiber isn't essential, especially in a ketogenic metabolism, so avoiding fiber just means the food you eat is even more nutritious

But I’ll end on this note: Whatever I or someone say here on internet, best to double-check it all with your dietitian if doing an overseen diet, and yourself from internet if you’re doing it on your own.

Completely agreed, really good advice. Monitoring personal health metrics is also helpful, especially lipids, ketones, glucose, fasting insulin, etc...

Nutrition and health are no small things to play with. Our body is flexible and can survive a whole lot, in a lot of different situations, but there are prerequisites for it to thrive in a sustainable way. And there’s a fundamental distinction between just surviving/existing and thriving/being healthy.

I couldn't agree more, well said.