For some people, caffeine can be a reliable source for promoting wakefulness, sharpening attention, and refining motor coordination. However, its effects are not universally positive, as others may experience jitteriness and anxiety in response to caffeine consumption. Kirtly Jones, MD, talks to Scot Singpiel, host and producer of Who Cares About Men's Health, about the complex relationship between caffeine and cognition, highlighting caffeine's intellectual consequences on different individuals.