What’s really behind these people’s temperaments are ample glucose reserves in the brain. As a result, they can handle a heck of a lot of trauma without being affected. Glucose is a protective biochemical critical to the brain because it places a veil of protection over sensitive brain and neurological tissue. Medical research has not yet tapped into an understanding of just how much glucose the brain requires to function in times of stress—and just how critical it is that there’s ample glucose reserved in the storage bank of the brain.