When I started monitoring my blood sugar on keto, I was sharing on my Instagram and had a lot of the "I'm a nurse and you're blood sugar is too low" comments and messages on my posts.
Low blood sugar is a problem also known as hypoglycemia. However, it's not the same if you have ketones present.
When you are in ketosis, your blood sugar is not going to be high, it's going to be low. This is what you will typically see:
Low Ketones - High/Moderate Blood Sugar
High Ketones - Low blood sugar
This is because your body is now using ketones for fuel and not glucose (sugar).
I personally use the Keto Mojo from Amazon to check both my blood sugar and my ketones. I typically check in the morning when waking up and then sometimes after lunch depending on how I'm feeling.
It's pricey but you'll be able to get a feel pretty quickly for what's pulling you out of ketosis. I am the type of person where the smallest thing will take me out of ketosis like a spoon full of tomato sauce, cabbage or peppers. Each person will have different reactions to different foods. The biggest thing is processed keto foods. You can almost guarantee that any packaged keto anything is going to knock you out of ketosis. Natural flavors usually being the culprit as they are maltodextrin carried most of the time.
What numbers should you be at?
This is going to look different for each person. I personally feel best around 2.0 ketones and 75-80 blood sugar. The combination of the two together is perfect for me.
Here is a link to the monitor I use from Amazon: