Re: Ketogenic Diet - Path To Transformation?
dugdeep said:
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[quote author=Megan]
d said:
I don't think, at this point, we're in the realm of what paleolithic humans did, at least not how people usually think of paleolithic humans. Figuring out protein restriction to suppress mTor pathway and switch out malfunctioning mitochondria for healthy ones is not what our paleolithic ancestors would have stumbled on accidentally. We're in a whole different ballpark here.
Nora suggested that in part; hence the peculiar subtitle of the first edition of her book: "Empower Your Total Health the Way Evolution Intended (…and Didn't)". The thing about paleolithic humans is that many of them tended to be very healthy, without counting anything, and they moved and used their bodies in ways that maintained their mitochondria effectively. The mTOR idea is controversial -- I don't see a consensus forming as yet. Some people think it's just wrong. Personally, I think it is a good idea to avoid unnecessary protein consumption simply because protein is expensive. The importance of autophagy is understood and accepted by most sources I have read recently, and ketogenic paleolithic humans would have encouraged that too, without even knowing about it.
You think so? I think this way of eating is rather "unnatural" and tends to go against what a paleolithic human would fall into based on following hunger signals. To me, this whole diet is like walking a tightrope - too much protein, which is really easy to fall into, and you lose balance. Too much carb and you lose balance. God forbid you have a celebratory feast once in awhile. I find it takes me about a week to get back on track after any diversion from course and that usually means struggling against cravings.
Overall, I find it hard to believe that ketogenic paleolithic humans would have encouraged autophagy without understanding why they were doing it unless they were in tune with their bodies in ways we can't begin to understand. But I suppose that's possible. Certainly just following your appetite will not result in this style of eating, OSIT.
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The other replies you have received cover most of what I would have said and more but yes, paleolithic diet supported autophagy because ketogenic diet supports it and paleolithic diet appears to have been typically ketogenic, as are some modern hunter/gatherer diets. That is pretty much the premise on which this KD topic is built. The term ketogenic by itself does not mean zero carb or plant-free, although we are experimenting here with the extreme low end of KD, in the interest of elevating ketones more than usual. It means low enough in starch and sugar to stimulate ketogenesis (nominally at a level of 0.5 mmol BOHB or higher). 50 g/d of carbs or less will typically do it very well, and some people can go quite a bit higher.
With regard to appetite, it is important to distinguish between that and drug addiction. "Appetite" for wheat or (isolated/refined) sugar is really drug addiction (and perhaps dairy too). It certainly isn't because either of these nutrient-poor "foods" is "delicious." Metabolic irregularities can exacerbate cravings and addictive tendencies. If you can address the underlying causes, it is quite possible that your appetite will settle down and behave. Some find this easy; some find it hard, for reasons that can be entirely unclear. But if it is hard, it sure doesn't hurt to look for "messages" in that, irrespective of where the roots may lie.
dd said:
[quote author=Megan]
d said:
[quote author=Megan]
You say that the protein is increasing blood sugar, but have you measured your blood sugar to confirm this?
No, I don't have the means. As I said, I'm only going by what I felt as far as symptoms go. No objective measurements, so I could be wrong. That said, what I was feeling was not a "signal" of the stomach emptying or anything like that. It was low blood sugar symptoms or something that mimicked those - ravenous hunger, crankiness, irritability, sometimes hot or cold flashes, sometimes headaches or lightheadedness. That was a big hint to me that I wasn't in ketosis, because skipping a meal was not the least bit comfortable.
Yes, low blood glucose, not high. Too much protein will stimulate insulin, taking you out of ketosis and lowering blood glucose. Maybe you are especially prone to that. You can buy a glucometer fairly cheaply at a drug store.[/quote]
Hmmm... I hadn't thought of that. So you're suggesting that the excessive protein caused an insulin spike which led to low blood sugar rather than what I had assumed - that protein was being converted to sugar, causing a rise in blood sugar and in turn causing a crash, or at least keeping me in sugar-burner mode. I suppose that could be the case. Perhaps I should get myself a glucometer and do some experimenting.
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Some researchers wince a bit at the term "insulin spike," but it's OK. Insulin is a regulatory hormone that goes up or down as needed. It responds to high glucose or protein by going up, and that is a normal kind of response. A typical glucose response curve is a spread-out upside-down "U," weighted a bit to the left (there's your "spike"), and it results from insulin rising and signaling the body to store this stuff somewhere before it does serious damage. (The curve is graphed from the observed blood glucose level over time, not dietary intake of glucose or protein.)
In diabetes, the glucose doesn't come back down adequately, due to lack of insulin response or loss of capacity to produce insulin, and then the serious damage goes ahead and happens.
What you are describing sounds like the "crash" associated with hypoglycemia (my old nemesis). That represents a very different glucose response curve in which the glucose level turns around and drops low after some number of hours. The lower the drop the worse the symptoms -- the "crash." Mine was diagnosed using a 4-hour glucose tolerance test; my mother had a 6-hour test. Hopefully, using a home glucometer you can observe whether this happens without having to endure all those blood draws. I would take a lancet over a syringe any day! (I am not saying that there might not also be advantages to having it done by a lab, and analyzed by a doctor.)
I was very fortunate in being able to resolve my hypoglycemia issues before I started the KD, simply by eliminating grains (which resulted in dropping to the LWB ~72 g/d carb level -- near the ketogenic threshold). At the time I did not yet have the indications for a diagnosis of metabolic syndrome, but I appeared to be heading in that direction with a fasting glucose level of around 104 or so and increasing over time. It ranges 90-100 now, with a preference for the lower end of that range, which is good enough for me.
Perhaps you have more work to do with blood sugar before you can benefit from the KD. I can't remember but have you been checked for metabolic syndrome?
dd said:
None the less, I think whatever was happening was suppressing ketosis, because once I did start lowering protein consumption I went through ketosis transition symptoms allover again. But I guess I won't know for sure without blood glucose measurements.
OK, first some terms. Ketogenesis is the process of creating ketones from fat. Ketosis is a state of elevated ketones. Keto-adaptation is a term coined by Phinney or Volek (I forget which) that describes the body's adaptation
over time to a diet in which less glucose is consumed than will meet the body's demand, resulting in ketogenesis ([ADDED] in addition to neoglucogenesis), resulting (hopefully) in "nutritional" ketosis.
Excess glucose or insulin can knock you right out of ketogenesis. Blood ketone levels can vary quite a bit through the day and I suspect (but don't know for sure) that they will drop rapidly if ketogenesis stops and doesn't restart quickly (due to the brain's heavy energy demand), resulting in loss of ketosis. That in turn would reduce your brain's supply of ketones, assuming that it is indeed keto-adapted, and you could feel that quite a bit -- in the ways that you usually would feel when your brain's energy supply is reduced! (Although it doesn't take a huge amount -- 0.5 mmol of circulating BOHB is a high enough level to supply significant ketone fuel to the brain.) I don't know how quickly the brain can switch back to straight glucose consumption, but I think it is fast (to keep you from dying), so you might not feel it for long. I would like to see some research about this.
You would still be keto-adapted, however, for the time being (meaning among other things that your muscles are preferentially using fat over ketones), and my own dietary excursions have at least confirmed that for me if not anyone else.
The "transition symptoms" that you mentioned are an aspect of keto-adaptation, a slow process that has been observed to require a couple of weeks even in athletes. I haven't seen anything to suggest that anything would remove keto-adaptation quickly, any more than you can achieve it quickly. More likely, you are not fully keto-adapted to begin with, due to metabolic or dietary issues, or possibly even some other cause that hasn't yet been considered.