How Can Blood Sugar Be High Without Eating

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Controlling The Dawn Phenomenon

Do you wake up with a blood glucose level that’s higher than when you went to bed? You might wonder how this could be. Is this “dawn phenomenon” serious, and what can you do about it? Our reader Mishelle commented here, “I don’t eat [much] during the day. [I take metformin morning and night.] My blood sugar is still too high in the morning…sometimes 125–140ish.” How can Mishelle’s glucose levels go up if she didn’t eat anything? She probably has a mild case of dawn phenomenon. Her glucose is going up from sources other than digested food. Some of it is produced by the liver from stored starch and fatty acids. Livers that produce too much glucose are one of the main ways diabetes causes high blood glucose levels. Other organs also produce small amounts of glucose. This is called “gluconeogenesis” for you science freaks out there. Organs do this to keep blood glucose from going too low at night or other times of not eating. From about 2 AM to 8 AM, most people’s bodies produce hormones, including cortisol, glucagon, and epinephrine. All these hormones increase insulin resistance and tell the liver to make more glucose. The idea is to get you enough glucose t Continue reading >>

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  1. antiquarian

    Does your blood sugar ever rise all by itself, without eating?

    I've been having some weird blood sugars lately.
    This morning fasting was 122
    Had my flax meal muffin and 2 scrambled eggs
    2 hours later I was at 121...which was good...
    Then, for some reason, when I tested just before lunch it was at 133. I hadn't eaten anything...just had coffee with whipping cream.
    Had lunch...1/2 cup full fat yogurt with 1/4 cup berries and a handful of flax meal granola.
    2 hours post meal I was 149.
    I just can't figure out the 12 point rise between 2 hours post bkfast, and just before lunch. Any thoughts?

  2. mizmac

    The meter has a 20% accuracy problem.

  3. Nicoletti

    It's either a liver dump, or for some, I know it does for me, caffeine can raise blood sugar. I drink decaf.
    Or, as above, it's a meter accuracy thing. Personally, I would not give it a second thought.

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