I've been googling during the down time and think I've pinpointed the cause of my confusion.
zoobyshoe said:
Somehow the way I've been eating has produced fat loss. It seems to me that all this fat must have been turned to ketones to be burned away.
This seems to be true. All the sites seem to agree that fat stores are only used when other fuel sources have been depleted and that the only way fat is used is by being made into ketones. At least, I haven't found mention of any alternate way fat is used up.
zoobyshoe said:
Turning fat to ketones is called "ketosis".
This does not seem to be true:
ketosis
<biochemistry> Metabolic production of abnormal amounts of ketones. A consequence of diabetes melittus.
http://cancerweb.ncl.ac.uk/cgi-bin/omd?query=ketosis&action=Search+OMD
ke·to·sis (k-tss)
n. pl. ke·to·ses (-sz)
A pathological increase in the production of ketone bodies, as in uncontrolled diabetes mellitus.
http://medical-dictionary.thefreedictionary.com/ketosis
One entry found for ketosis.
Main Entry: ke·to·sis
Pronunciation: kemacron-primarystresstomacr-sschwas
Function: noun
Inflected Form(s): plural -to·ses /-secondarystresssemacronz/
1 : an abnormal increase of ketone bodies in the body in conditions of reduced or disturbed carbohydrate metabolism (as in uncontrolled diabetes mellitus) -- compare ACIDOSIS, ALKALOSIS
- ke·tot·ic /-primarystresstät-ik/ adjective
http://www2.merriam-webster.com/cgi-bin/mwmednlm?book=Medical&va=ketosis
In summary, it seems that the term
ketosis only refers to a condition where the ketones have built up to an abnormal, or pathological level.
Yet, the first sentence of the Wikipedia definition says:
Ketosis (IPA pronunciation: [ki'tosɪs]) is a stage in metabolism occurring when the liver has been depleted of stored glycogen and switches to a chronic fasting mode during long periods of starvation.
http://en.wikipedia.org/wiki/Ketosis
This, and the rest of that article, imply nothing abnormal or pathological about ketosis and seem to merely be describing it as the process whereby fat is employed for energy when other sources have been depleted. It does not define ketosis as that point in ketone buildup where the levels become abnormal or dangerous, as the medical dictionaries do
Another site I found by googling
medical dictionaries describes ketosis the same way:
Ketosis
1. Definition
Definition
Ketosis is a process in which your body converts fats into energy. During the conversion, ketones are produced as a by-product. Ketones can give your breath a sweet, fruity smell that may be mistaken for alcohol.
http://www.nhsdirect.nhs.uk/articles/article.aspx?articleId=221
Further down it only characterizes ketosis (here: the conversion of fat to energy) as bad when it is
prolonged
I get the notion from this that there is confusion, or possible disagreement, about this term even among people who are conversant with biology.
I said:
zoobyshoe said:
Therefore, It seems to me I must have been in ketosis many times during this diet. Not "ketotic" or "in ketoacidosis", just in ketosis: turning fat to ketones.
I think my logic is sound here despite the fact I was provided with a incorrect term by the Wikipedia.
By checking all the words beginning with
keto- I could find in the medical dictionaries, I discovered one that probably fits the bill: ketogenesis.
Ketogenesis is the process by which ketone bodies are produced as a result of fatty acid breakdown.
http://en.wikipedia.org/wiki/Ketogenesis
If I rewrite my statement substituting this word, it becomes what I meant to say:
Therefore, it seems to me I must have been in ketogenesis many times during this diet. Not "ketotic" or "in ketoacidosis", just in ketogenesis: turning fat to ketones.
This article on ketogenesis from the Wikipedia makes the distinction between the two terms clear:
Ketone bodies are created at moderate levels in everyone's bodies, such as during sleep and other times when no carbohydrates are available. However, when ketogenesis is happening at abnormally high levels, the body is said to be in a state of ketosis.
http://en.wikipedia.org/wiki/Ketogenesis
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Back to acetone breath. This site might offer a clue:
Atkins appears to have invented the term BDK to denote a state of mild ketosis without hyperglycemia. This commonly results from eating a low-carb diet, or fasting, so the body has to burn stored fat. As a note, this sort of ketosis is what causes morning breath, because our body often runs out of carbs during the night.
http://patrifriedman.com/writing/journal/expat/975ketosis.html
It is in agreement with the Wikipedia article on ketogenesis that we normally resort to producing ketones during sleep when our carbs run out, but it asserts that this is enough to make the breath smell of acetone. Morning breath can be caused by many things, of course, but if this is authentically one of them then this is most likely the cause of the smell that alarmed the dentist.
My intake of carbs has been lower than ever lately and I'm sure I've been running out earlier and earlier during sleep. The appointment was at 9:15 A.M. and I went over there not having eaten any breakfast to stop the ketogenesis.
That's a hypothesis, anyway, pending some better sources to substantiate this normal, nightime production of ketones than the Wikipedia and the other site (that author makes no claim except to be a researcher).