The minimum amount of carbohydrate needed for the brain to function efficiently is
Carbohydrate (glucose) is your body's favorite energy source. Many organs in the body can use protein or fat for energy if carbohydrate is not available. The brain, however, requires some carbohydrate (glucose) to function. The brain uses an average minimum of 130 grams carbohydrate daily.This minimal amount is where the RDA is derived. Consider that other parts of the body would like to use carbohydrate for energy as well.any organs in the body can use protein or fat for energy if carbohydrate is not available. The brain, however, requires some carbohydrate (glucose) to function. The brain uses an average minimum of 130 grams carbohydrate daily. This minimal amount is where the RDA is derived.