The other day I had a bowl of LIzi's low-sugar granola with milk. Two hours later I had a BG reading of 10.4. Then today I had a bowl of granola with Greek yogurt and blueberries and the BG reading was 8.1. Is this normal? I'm going to try with just milk again tomorrow. Just to see if it's still high.
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Granola different BG readings
- Thread starter Funnyday
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Bear in mind no two days (or two hours) are identical and there is more than just food that can affect your blood sugars.
For example, you may have been more stressed yesterday or maybe ran up and down stairs more today or you may have slept better today or ...
Then you have the inaccuracy of your meter and strips - they can have an inaccuracy of 15% (both the readins are within 15% of 9.1, for example).
On top of all that, no two bowls of granola will be the same. Assuming you weighed the granola, milk and yoghurt, you may have more seeds or nuts or ... one day of the next.
Yes, the milk may have made a difference but so could many other things.
Sadly for an engineer like me, this is all approximation.
For example, you may have been more stressed yesterday or maybe ran up and down stairs more today or you may have slept better today or ...
Then you have the inaccuracy of your meter and strips - they can have an inaccuracy of 15% (both the readins are within 15% of 9.1, for example).
On top of all that, no two bowls of granola will be the same. Assuming you weighed the granola, milk and yoghurt, you may have more seeds or nuts or ... one day of the next.
Yes, the milk may have made a difference but so could many other things.
Sadly for an engineer like me, this is all approximation.
rebrascora
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You don't mention your premeal reading?? What your levels were before eating will have a significant bearing on where your levels end up 2 hours after eating.
rebrascora
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When you say, usually when do you test in the morning and when do you eat breakfast?
This is all very relevant because our liver tends to release glucose into our blood stream on a morning until we start eating. This is known as Dawn Phenomenon and can start about 3am but for many of us it ramps up once we get out of bed and before we eat (referred to as Foot on the Floor Syndrome). This itself can raise BG levels by several mmols, so if you tested your BG as soon as you woke up and then got washed and dressed and prepped breakfast it might increase 2 or 3 mmols in that time before you even eat or drink anything. It is therefore important to test each time immediately before you eat and then 2 hours after to see the result of that particular meal/food combination. Without that premeal reading your post meal reading tells you very little because BG levels can be really quite variable especially in the morning.
Eddy Edson
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Just to point out a new study preprint published today: For non-diabetics, the variability in BG response between eating the same meal on different occasions is about the same as the variability in BG response between eating different meals.
Read the discussion section of the paper if interested in the nuance.
Would be interesting to see how this pans out for diabetics, but there really isn't much reason to expect that your BG response to the same meal on different days will be the same.
Read the discussion section of the paper if interested in the nuance.
Would be interesting to see how this pans out for diabetics, but there really isn't much reason to expect that your BG response to the same meal on different days will be the same.
Thanks for the reminder. In my comment above, I forgot to mention the exercise I partook in yesterday can affect my Dawn Phenomenon/Foot On The Floor today.
Another reason why I never expect the same reaction every day to the same food, especially breakfast.
Leadinglights
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So what were you before you had the granola as that is important for you to know if that portion size of granola was a good choice. /
Leadinglights
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So that is rather the top end of what you are aiming at 2-3mmol/l increase. You might be better with half of the portion you had with some Greek yoghurt.
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Really interesting @Eddy Edson
Explains some of the frustrations where ‘reliable’ meals misbehave.
Though generally forum folks do seem to be able to find a least a degree of reliability/consistency with meals that ‘usually work’, so I guess it’s not a completely random free for all?!
Eddy Edson
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It's well worth going through the paper and also the twitter thread for the nuance, but a couple of points from these:
- The study couldn't measure the sources of variability: some combination of device and physiological variability, but no granular attribution from this study. A lot of behavioural and other kinds of contingent variability were ruled out to a greater or lesser extent by the study design; see the commentary.
- It was a secondary analysis from prior controlled feeding studies looking at various diets. Data from the very low carb diets in these studies wasn't included here because the postprandial glucose response is minimal with these and not subject to much variability.
- The same-meal correlation was "moderate", about 0.40 iirc, so def not a totally "random free for all".
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