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While high-protein food like meat and dairy are low-carb, protein can still raise blood sugars. High protein foods also digests more slowly, and therefore may require you to spread your meal time insulin over time to prevent low blood sugars.

How does Protein affect blood glucose?

Protein raises blood sugar for some people when the liver processes the protein and converts the protein into sugar therefore dumping the glucose it into the body.

Therefore, you may want to give yourself insulin for protein, depending on whether you notice high protein foods affecting your blood sugars.

How Can I test if protein affects my blood glucose?

One way of testing whether protein affects your blood glucose would be to wait a few hours for your blood glucose to be stable, with no food or insulin consumed within the past 5 hours.

Once stable, consume a large high protein, no carb meal like chicken or steak.

Watch your CGM trend over the course of the next 5-6 hours and see whether your blood sugar goes up in any significant way.

Protein slowing digestion

Protein slows digestion, which means depending on the meal, can make post-meal glucose spikes happen much later after eating, and over a longer time.

High protein meals can be handled with extended or combo boluses, where insulin intake is spread over the course of a few hours, or split where some is given before the meal, and the rest is given over the course of a few hours.