When the body goes without carbohydrates for a long time, it switches to burning fat for fuel.

Fun fact, we store fat for energy. When we sleep, between meals we are always burning fat. Babies burn fat for fuel all the tiem.

to save what little glucose it has for the brain, the muscles temporarily become “insulin resistant.”

Insulin resistant is the wrong term here, the body is not flooded with high levels of insulin in a fat metabolism. The proper term is glucose sparing, most of the body is going to burn fat for energy in this state with the major exception being red blood cells and about 5-15% of brain energy.

fail a standard oral glucose tolerance test.

Will fail a improperly administered oral glucose tolerance test, OGTTs must be primed for accuracy. The body's response to insulin is very sensitive, but the pancreas isn't maintaining a hot cache of insulin, because you arn't using very much insulin. We have discussed this in detail before https://lemmy.world/post/46537093 . This is normal, your body doesn't waste energy. This has no negative downsides because the pancreas will just make more glucose on demand when you consume carbohydrates and elevate glucose levels, and fill up the quick release cache.

High intake of certain saturated fats can sometimes lead to an accumulation of fats inside muscle and liver cells (called intramyocellular lipids).

Citation please - typically this condition is caused by super high elevated insulin levels and full fat cells (and the fat has nowhere to go) typically in a pre-diabetic state.

This buildup can interfere with insulin signaling, potentially worsening cellular insulin resistance under the hood.

The fat in the muscles wont cause insulin signaling issues, your confusing cause and effect. The fat is ectopically stored around the body BECAUSE of the elevated insulin. visceral fat, intramuscular fat is a hallmark of metabolic dysfunction caused by hyperinsulinemia. In fact this is EXACTLY how marbled meat is made in cows, they are forced to eat excessive carbohydrates leading to this very condition

While a carnivore diet frequently causes a drop in blood sugar levels because you aren’t eating sugar, it does not automatically make someone immune to developing insulin resistance or diabetes over the long term.

Citation please - How can a diet without elevated blood glucose, and thus without elevated insulin lead to a condition of carbohydrate intolerance (type 2 diabetes). I already addressed the failings of a unprimed OGTT above in the ketogenic post i linked .

Is this LLM generated? As a quick test, tell me what insulin resistance is in 3 other words? And how would you correctly conduct an OGTT for someone fat adapted?

Hey, please don't add substantive additions to a message after you sent it. I had missed your updates.

eating a plant based or reduced meat diet doesn’t mean someone will develop diabetes. Your original statement was a false equivalence.

I stand by what I said - type 2 diabetes is extremely expensive and is driven by the hyper-vegetarian food environment the world finds itself in. Yes a whole food plant based diet is less likely to develop T2D, but there are still fat vegans, so its not a guarantee.

We shouldn’t be dragged down into the discussion equivalent of side quests when there’s a main quest to manage.

Yes, people should not be afraid of meat and they should embrace it has a health tool.

Once again the background to this discussion is essentially the apocalypse aka a serious mass extinction in which 70% to 99% of all life on earth dies. Even if you were completely right (which you aren’t) the trade-off just isn’t there.

I disagree with your premise - right now 20% of the world calories from from animals, with human ingenuity we can increase this... but the real plague is metabolic impairment and while carnivore is probably the single most power tool here, it isn't the only tool - getting most people into a low carb or ketogenic state is going to be a massive improvement, and carnivore as a health tool can be used for people who still have issues (mostly gut issue, autoimmune, etc)