How does the body create glucose for the brain when the body isn’t taking in any carbs?

Question

How does the body create glucose for the brain when the body isn’t taking in any carbs?

In: 6

Answer 1

The body can metabolize both fat and proteins into glucose for energy. It takes different pathways and metabolisms, and the direct use of carbohydrates are “preferred”.

The exact chemistry is complicated, but just know if the body can’t find free glucose for energy it can shift into fat based, or protein based metabolisms for energy. This is exactly how low carb diets function.

EDIT – When I say “preferred” I’m not making a medical or health recommendation/statement. I’m just saying that given a supply of both, the body will metabolize carbohydrates before it starts to metabolize fats and proteins.