My working hypothesis (based on blood, hair, urine and symptoms) is that I have a mercury toxicity, made significantly worse by my taking high doses of alpha lipoic acid starting in Nov 2013. ALA ends up being a very good heavy metal chelator that goes intracellular and across the blood brain barrier. It converts to a dihydroxy form that is a two thiol chelator. So I may have moved mercury, which was very high in blood, into the intracellular environment and into my brain, where it then impaired my electron transport chain and brought on the sudden fatigue and neurological symptoms.
Complex II of the electron transport chain contains a iron-sulfur complex. Mercury has high affinity for those metal binding sites. For example, mercury will bind to a single thiol enzyme or protein was one MILLION times greater affinity than a metal like zinc. So one possibility is that my Complex II was highly impaired and I simply was not able to utilize fats very efficiently. Many complexes in ETC contain the Iron-sulfur complexes. ATP Synthase contains other metals. They are all targets for mercury.
Can you show me a good diagram that illustrates the pathway you are referring to? Because all of the fatty acid metabolism charts I found did not show feeding to Complex II. What I am wondering is if aerobic metabolism is impaired, does the body resort to using fat in a different pathway that is far less efficient?
The thing is, eating larger amounts of glucose did not fix what was broken. What it did do is send my blood glucose over 160 one hour after eating the glucose. And I still felt broken in terms of energy. And I still went into glycolysis and got horrific PEM symptoms after exercise. So I think the change of diet was simply coincidental to the ingestion of the high dose ALA, and I have problems blaming the result on a high fat diet.
The stuff about fat, FADH2 & Complex II is discussed at great length on the blog I linked to in my reply to @Gondwanaland. Wish I had a handy diagram.
Mercury is certainly bad news. I don't doubt this is an issue for many. Having said that, the symptoms you are describing which coincided with the induction of a low carb diet and that you are attributing to inappropriate ALA supplementation, I've experienced those same symptoms on a low carb diet (long before I took ALA or any other supplement) and I've heard this sort of metabolic breakdown described many times over in the paleo/LC blogosphere and some people on this forum like @Vegas. An immense amount of acrimonious debate has occurred in that community over the last few years as a result of all the people experiencing such symptoms who believe (and have various practitioners telling them) that they have hypothyroidism, not understanding that the low T3/high rT3 issue is a sign of much more profound metabolic problems. As you point out, eating glucose again does NOT fix whatever was broken. In fact, glucose is tolerated less well than before LC and now you find yourself spiking to 160 postprandially. I've been there myself. I ate like that for a year and a half and ended up with a temperature of 94-95 F and a host of very severe symptoms verging on death. You might wanna look into the microbiome stuff as a more likely explanation for these symptoms than mercury.