In studies of prolonged fasting (e.g., 60 days) on non-overweight individuals, subjects with sufficient beta-hydroxybutyrate (BHB) levels tolerated insulin-induced hypoglycemia well.

“there's two studies where they took people who are not even overweight they fasted them for 60 days and gave him a big slug of insulin it's like why it's like just to see what would happen well no no I mean that study was to actually see if the ketones were protective in the presence of hypoglycemia they injected those patients with insulin took their glucose down to below 1 millimolar these people's been walking around with it yeah they did totally fine provided they had enough bhp”