Saturday, 25 July 2009

Higher morning BS than evening?

>I recently had a Diabetes Nutrition class in which the question was asked, "Is your FBG higher or lower in the morning?" Everyone but me said, "Lower." I said, "Higher."The Dr. told me that mine is higher because I have a Liver Problem and it is normal for the FBG to be lower.<

I don't know that it could be called a liver problem or abnormal... at least, I've never seen anything that led me to believe dawn phenomenon (that's what this higher-than- expected fasting glucose number is called) results from any kind of liver malfunction. It simply is what it is. One of the functions of the normal, healthy liver is to take some circulating glucose, convert it into glycogen, and store it for when it's needed. Then when the liver senses that you don't have enough glucose moving around to support your body's demands at the moment (it takes a certain amount of glucose to maintain brain and muscle function), it can take some of that glycogen, reconvert it back to glucose, and move it back into the bloodstream. This can happen at any hour of the day or night.

When you don't eat for 10 or 12 hours, many times the liver is just being oh-so-helpful and giving you a little food, that's all. In a non-diabetic, the pancreas would compensate and excrete enough insulin to "cover" that extra excreted glucose, but our pancreases don't get their memos, so in us, up goes our blood glucose level, and tah-dah! Dawn phenomenon. But as I say, it's not a liver problem, not as far as I know. But why this happens in some and not in others is for greater minds than mine to say. But I would definitely put it under that all-purpose YMMV (your mileage may vary) category we like to use around here.

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