You sit down to work and within minutes your mind drifts. You lose the thread of a conversation, forget why you opened a tab, or spend hours feeling vaguely scattered without ever landing in deep concentration.

If you are reading this, you are probably not looking for reassurance that blueberries are good for the brain. You want something more useful — a way to understand what is actually happening in your own body and why your current efforts may or may not be moving the needle.