I do not know what you’re referring to, perhaps some supporting data would help. The current method of testing for ketones is ketones freely available in blood

I do not know what you’re referring to, perhaps some supporting data would help. The current method of testing for ketones is ketones freely available in blood stream. The ketones are released by the liver when it’s too full of them and thus they spill over to the blood stream. The consequence therefore is that once you’re fully keto adapted, your ketones won’t spike too high as your body can efficiently generate the required amount. Most people who do a long fast, they’ll have 1+mmol (higher at 3+) ketones, whereas someone who’s adapted maintains sub 1mmol. Also, if all you’re eating is protein and large fats, youre producing ketones otherwise you’d die as there’s no carbs/glucose. So yeah, Inuit and carnivore diet people couldn’t exist. live experiments and observations are a thing, and they are happening everywhere if you do a quick search