[throwaway_tech]

>Eating normal ammounts of carbs isn't going to kill you, it's literally our main energy source.

Its only the main energy source because its the main dietary intake. If you change your dietary intake consistent with dietary ketosis then carbs/glucose will not be the main energy source, ketones will become the main energy source.

Consider two things: 1) when in a fasted state, the body will begin to produce ketones and begins to run off of ketones instead of glucose (which our body can continue to make without eating carbs) suggesting ketones are the default energy source until we introduce dietary carbs that spike insulin; and 2) as the study notes ketones are the more efficient fuel source for the brain only because our modern diets carb laden and insulin spiking our brains are contantly using glucose instead of ketones.