Excessive amounts of caffeine can trigger the body's fight or flight response even though no real danger exists. This overactive fight or flight response can contribute to anxiety... How caffeine affects you on a particular occasion depends on how many other potential triggers are present and how intense they are.

Several of the contributing factors are: Biological Factors; Stress Overload / Lifestyle Factors; Childhood Environment; Thought Patterns; Genetic Factors.

If you feel anxious, you're not alone. In fact, one in eight Americans experience overwhelming anxiety that interferes with their daily lives.

According to a report by the National Institute of Health (NIH), anxiety is a psychological risk factor associated with heavy or problem drinking among college students.