That is insulin resistance/sensitivity and is not of concern to anybody that isnt morbidly obese (in gross terms).
First of all, it's worth noting that this is a revised claim you're making. First you said ketosis has no inherent advantages; now you're saying these advantages are not notable except for morbidly obese persons.
Lyle and I disagree. I disagree because despite being a non-obese person, being in ketosis prevented me from getting severe urges to eat carbohydrates, something that always happens to me on low/moderate carbohydrate diets. Lyle files this under an inherent advantage of ketosis for "carb addicted" people. My experience fits into his explanations perfectly.
Lyle disagrees as well: in his review of a study on ketosis vs low-carb diets, Lyle states that "extreme carbohydrate restriction tends to help with stubborn lower body fat mobilization," something I already pointed out. I don't think it's fair to interpret that as only applying to morbidly obese persons; Lyle seems pretty clear that this is a widespread advantage for people who have certain stubborn body fat deposits, not just the obese.
In short, it's clear that the inherent advantages to ketosis mentioned by Lyle won't just affect obese persons; they will be enjoyed by most people with the specific characteristics listed.
http://www.bodyrecomposition.com/research-review/ketogenic-low-carbohydrate-diets-have-no-metabolic-advantage-over-nonketogenic-low-carbohydrate-diets-research-review.htmlFinally, I think it is telling that for his "Rapid Fat Loss Handbook," Lyle prescribes a ketogenic diet. He describes the diet as a "nearly all protein affair
s, with little to no dietary fat" and as "the safest and sanest way to lose fat quickly without sacrificing health (or muscle mass)."
http://www.bodyrecomposition.com/the-rapid-fat-loss-handbookI'm not sure why you're attempting to cite the author of "The Ketogenic Diet" for evidence that ketogenic diets have no inherent advantages over other sorts.
At most, you can say high protein diets are marginally better because of what I already exposed, other than that, Keto is a fad.
So even if we deny keto's inherent benefits (which I just argued can't be denied), it is liable to be better than other diets in virtue of its higher protein content, albeit "marginally" so. Combine this with the fact that ketosis
does in fact have inherent benefits (as Lyle, I, and many competitors who serve as guinea pigs can attest) plus the scientific research indicating that low carb/keto diets result in the most favorable body composition changes in the short term, and it seems fair to say ketosis has significant, not marginal, benefits.