Why can the exact same breakfast give me completely different readings?

[NorthBridge82]

I’ve been eating almost exactly the same breakfast several days a week because I wanted something predictable. Oddly, my readings afterwards are anything but predictable. Some mornings everything looks great, while on another day the same food gives me a much bigger rise even though I haven’t knowingly changed anything. Sleep and stress are the only variables I can think of. Do other people see this much variation from identical meals, or am I missing something obvious?

 

[lovinglife]

Hi @NorthBridge82 & welcome

You don’t say what type of diabetes you have or what medication if anything you are on for your diabetes. What is in the meal you are eating and what’s the variations in your numbers

Sorry for all the questions but the more info you feel able to share will help other members to share their experiences & ideas that may apply

 

[sgm14]

I’ve been eating almost exactly the same breakfast several days a week because I wanted something predictable. Oddly, my readings afterwards are anything but predictable. Some mornings everything looks great, while on another day the same food gives me a much bigger rise even though I haven’t knowingly changed anything. Sleep and stress are the only variables I can think of. Do other people see this much variation from identical meals, or am I missing something obvious?

So do, some don't.
I do. I'm type 1 on insulin and I eat the same breakfast every day at the same time and never know what is going to happen.

Some days I go high.
Some days I go low.
Some days I am fine.

I have no idea how I could cope without my Libre letting me know what type of day it is.

I was very frustrating at the start, but I have now mostly got used to it.

But eating new meals is a whole other ballgame and I still find that frustrating, especially as I have now idea how much insulin to take. (I guess I should be grateful that I am not a 'foodie' and quite content to eat the same meals every day and never eat out!)

You mention stress and some people find that does make a big difference. I have even seen some people mention that they stopped using a CGM like a libre because it stressed them out and actually caused their blood sugar to rises more.

There are also a lot of other factors that can affect blood sugar - see https://diabetesresearchconnection.org/42-factors-affect-blood-glucose.

I've also seem some people mention others that are on this list, such as the order in which you eat the food.

 

[KennyA]

I’ve been eating almost exactly the same breakfast several days a week because I wanted something predictable. Oddly, my readings afterwards are anything but predictable. Some mornings everything looks great, while on another day the same food gives me a much bigger rise even though I haven’t knowingly changed anything. Sleep and stress are the only variables I can think of. Do other people see this much variation from identical meals, or am I missing something obvious?

Food is the biggest single influence on BG but there are many others. Basically, whatever causes your liver to increase making glucose will probably result in your BG rising, and vice versa for things that slow down glucose manufacture.

 

[Jaylee]

Hi,

It’s one of those conundrums…

Do the same thing every morning but what am I rushing headlong into on any particular day?
Anticipating stress? (Work day.) My liver could be pushing out too..
For me with T1 injection site choice might afect it aswell?