Last night I went for a walk after dinner - blood sugar was about 132 two hours after dinner and just before exercising. After decent 3 mile walk , blood sugar was 97. That was about 10:30pm. I then watched a movie and had a cup of coffee - nothing to eat. At 1 am before going to bed, glucose measured 143. Why the jump, if I hadn't ingested anything?

Thanks,
Mark

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Hey Mark,
Gary Schindler's book "Think Like a Pancreas - A Practical Guide to Managing Diabetes with Insulin" states "caffeine tends to raise blood sugar approx 1 hour after ingestion. It does this by stimulating the secretion of stress hormones and promating the breakdown of fat (rather than sugar) for energy."

The book indicates that caffeine affects different people differently. It raises blood sugar in some enough to compensate for it, but not in others. It recommends that you check your blood sugar when you ingest caffeine, take insulin for a known meal without caffeine (or without food), and then 3 hours later to see what the affect is, if any. Try this again with the caffeine, and you will know how it affects you. That is if you are on insulin, if you are not on insulin, I am not sure what you do. I guess you can become a lab rat for a while until you figure it out.
Caffeine has been noted in some studies as a cause for raised blood sugars... I typically just have some decaf, so I can get the good benefits of the coffee, without the bad of the caffeine.

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