Without a mechanism of any sort I wouldn’t hang my hopes on elevated blood glucose being any more healthy in a person on a ketogenic diet. High blood glucose is toxic. A higher fasting glucose due to glucose sparing isn’t really a higher blood glucose as HbA1c tests show but I’ve heard several keto clinicians say now that they see symptoms of rising insulin resistance and symptoms of metabolic syndrome in some of their patients who go the high protein route. I wouldn’t be concerned, however, as long as your HbA1c continues to be good or improve.
People keep saying this but ignore the fact that one of the major demands for gluconeogenesis comes from consumption of protein.
Protein consumption leads to insulin secretion to build proteins out of amino acids. This insulin secretion, however, also removes blood glucose and fatty acids from the blood. The body has a concurrent glucagon response to protein consumption which stimulates gluconeogenesis. Protein consumption always stimulates glucagon and it’s actually moreso on a ketogenic diet (Ben Bikman himself makes this very point). So yes, gluconeogenesis is demand driven, but protein consumption is a major driver of that demand.