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Blood Sugar: What Causes High Blood Sugar Levels In The Morning

There are two reasons why your blood sugar levels may be high in the morning – the dawn phenomenon and the Somogyi effect. The dawn phenomenon is the end result of a combination of natural body changes that occur during the sleep cycle and can be explained as follows: Your body has little need for insulin between about midnight and about 3:00 a.m. (a time when your body is sleeping most soundly). Any insulin taken in the evening causes blood sugar levels to drop sharply during this time. Then, between 3:00 a.m. and 8:00 a.m., your body starts churning out stored glucose (sugar) to prepare for the upcoming day as well as releases hormones that reduce the body's sensitivity to insulin. All of these events happen as your bedtime insulin dose is also wearing off. These events, taken together, cause your body's blood sugar levels to rise in the morning (at "dawn"). A second cause of high blood sugar levels in the morning might be due to the Somogyi effect (named after the doctor who first wrote about it). This condition is also called "rebound hyperglycemia." Although the cascade of events and end result – high blood sugar levels in the morning – is the same as in the dawn phenome Continue reading >>

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Popular Questions

  1. tk421

    Sorry if this doesn't belong in this part of the forum, but it seems better here than the other places in the forum.
    I am having trouble finding a solid answer to this. Everywhere I look online tells me something different. I see some say around 50 mg/dl which I would think is totally hypoglycemic. So I don’t really believe that. I see others saying as long as you are below about 97 mg/dl. I see others that say in the 80s. Some say other things. I just want a straight answer. So I need some advice from a successful keto person.
    What is proper blood glucose levels for someone who is in ketosis? I got this blood glucose monitor and I think it may be defective or just a crappy brand. Yesterday my fasting blood glucose (after a 14 hour fast) was 83 mg/dl. Today (again after a 14 hour fast) was 97. I couldn’t believe it so I took my blood glucose again and it said 92. Then I ate exactly 3 pieces of bacon and a piece of cheese, and two hours later my blood glucose was 102. I thought WTF, so I immediately took it again and it said 109.
    So maybe I have a defective monitor (the Nova Max Plus), but regardless, there is probably at least a little bit of truth to it. But I seriously eat 25 grams or less of carbs per day. Usually less.
    Could someone please explain glucose levels to me in regards to ketosis.

  2. JBean

    In the absence of dietary carbohydrates, your body will break down fats and proteins to maintain your blood glucose in the normal range. Here's an explanation:
    https://en.m.wikipedia.org/wiki/Gluconeogenesis

  3. tk421

    Originally posted by JBean
    In the absence of dietary carbohydrates, your body will break down fats and proteins to maintain your blood glucose in the normal range. Here's an explanation:
    https://en.m.wikipedia.org/wiki/Gluconeogenesis Very interesting. Thanks for the info, that helps me a lot!!
    Cheers

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