Elevated morning blood sugar is a common concern. This is known as “the Dawn Phenomenon” and occurs due to hormonal effects in the early morning hours. It may possibly be even more pronounced on a low-carb diet, compared to other diets.
Many people get surprised as their average blood sugar (measured as HbA1c) goes down nicely on low carb, blood sugar is great during the day… but morning sugar remains elevated.
This is normally a natural phenomenon, caused by a morning rise in cortisol and other hormones that cause the liver to release glucose, thus raising blood sugar levels. This can be thought of as a way for the body to prepare you for getting active again, after sleeping.