A few years back I saw an interesting video by a low fat vegan who claimed that her type 1 diabetes was less fragile when she ate a very high carb, low fat diet--and her personal explanation for this what that it kept her liver glycogen levels fairly high, so that if she used a little too much insulin, and experienced a hypo, her counter-regulatory stress response resulted in more glucose being released by her liver than would be available to somebody eating a much lower carbohydrate diet. That might have been nonsense, but I don't know if I'd just dismiss it out of hand.

But anyways--the problem with the carbohydrate/insulin hypothesis still might be that it's just too simple. So you eat a bunch of carbs, your insulin goes up. An excess insulin response might cause or threaten hypoglycemia--so you overeat to either correct or avoid hypoglycemia. But it's not at least *usually* that you just get more hypoglycemic the more carbs you eat and so you just never stop eating so you get fat.

Fat eaten isn't neutral in this. But suppose we assumed it was. You eat some carbs, you've got this threatened hypoglycemia because you put out a bit more insulin than necessary, the body made a poor prediction of how much carbohydrate was going to be being absorbed an hour or two from now. Appetite up, you eat enough to cover that faulty prediction, and then some.

You could have had 400 calories of potato. But you had 400 calories of potato, 400 calories as damaged canola oil when you ate those french fries. Body makes a bad calculation, so you need to eat a bit more. If fat is neutral--whattaya need? More carbs. If it's fatty carbs--calories per needed gram of carbohydrate is higher than it would be without fat.

Of course, fat slows digestion of carbs. But also--fat digestion is much slower than carbohydrate, especially if eaten with carbohydrate, so while the carbs are all absorbed in an hour or two, the fat is still being digested eight or ten hours later.

So, keto, you never ate carbs, insulin didn't go up, the problem of keeping glucose in a narrow physiological limit is much less. Very low fat. Okay, maybe your body misfires if you eat 400 calories of carbohydrate and 400 calories as fat. Does it necessarily misfire worse, if you just eat 800 calories of carbohydrate? That might depend on the person. It might be better. We might be tempted to say, okay, a greater load, that's a greater challenge to the system. For somebody with sensory issues--increase the volume, increase auditory discomfort. Unless the sensory issue isn't discomfort from loud sounds, it could be the other way, low sensitivity, in which case, increasing the volume makes it easier to process the sounds, understand voices etc. Increased carbohydrate, with a decrease in fat content, could send a clearer signal, and a clearer signal might make for a more appropriate hormonal response.