Excess proteins can’t be stored in the body so the body will convert excess proteins to glucose which will trigger a release of insulin.
The conversion of protein to glucose occurs as a result of the hormone, glucagon.
This process is called gluconeogenesis.
This is why the recommendations on a keto diet are for fatty, not lean protein.
When we eat proteins that come with fat, this helps to slow the absorption of the glucose and blunt blood sugar spikes.
Fats have virtually no effect on blood sugar & insulin and keep you satiated and energized for hours. Fats are like logs on the fire.
In my clients with hypoglycemia and Reactive Hypoglycemia, they are especially sensitive to and prone to gluconeogenesis which in them leads to blood sugar crashes.