Think about the last time you felt genuinely, cleanly focused. Not wired. Not racing. Not your heart beating slightly too hard, your leg bouncing, your brain jumping between fifteen things without finishing any of them.

That feeling isn't focus. That is your central nervous system under chemical siege.

At doses above roughly 150mg, the minimum in most energy drinks, caffeine triggers an acute cortisol response. Your body reads it as a threat signal. Heart rate goes up. Neural noise increases. The prefrontal cortex (responsible for decision-making, sustained attention, complex thinking) begins to underperform under the load.

You feel like you're firing. You are scattered.

This is why you snap at colleagues over nothing. Why you start four tasks and finish none. Why you read the same paragraph three times and still don't know what it said. Why the anxiety that "has nothing to do with work" arrives precisely at 11am and 3pm, exactly when the cans do.

Most people never connect it. They decide they're just an anxious person. A scattered person. They are not. They are a person whose nervous system has been chronically overstimulated, and who has never been given the chance to find out what they're actually capable of.