Well I'm feeling a lot better today, I went for a three hour walk and got rid of those empty calories and prolly got back in ketosis. If not tonight then definitely tomorrow.
As far as refined sugar goes, I tend to agree with Tekla. I actually worked in a sugar factory for a few years, it was a fascinating job. Billions of sugar beets were trucked in, washed, sliced, superheated and pressed a few times to get all the juice out of them. Then the juice was filtered, pressed again, and finally cooked in giant vats, where a special bacteria was introduced to crystalise the actual sugar. This is where the difference lies, the machinery in the factory did all the work the digestive tract would have done had we just eaten a sugar beet, so we get all the glucose and none of the metabolic expenditure.
Anyway the human body is not evolved to handle this concentration of glucose. It is evolved to live sucessfully on meat and dark green veggies, like the hunter-gatherers in our ancient history did. When the body is in ketosis it is handling fat and glucose differently, and things like atheroschelorisis and diabetes just don't happen.
For me the main proof that refined sugar is a drug is the way my body reacted when I quit eating it routinely. I still got enough glucose from things like cabbage and asparagus, but I craved the sugar. It's been worse, like I said, than pills or nicotine could ever have been.