What is a common consequence of caffeine overconsumption?

Caffeine is a stimulant that affects the central nervous system. When consumed in moderate amounts, it can promote alertness and energy, but excessive intake can lead to heightened levels of anxiety and nervousness. This occurs because caffeine increases adrenaline production, which prepares the body for a "fight or flight" response. As a result, an individual may experience feelings of restlessness, jitteriness, and an overall sense of unease.

In contrast, drowsiness is generally associated with caffeine deficiency or withdrawal rather than overconsumption. Improved digestion is not a recognized consequence of caffeine overconsumption; while some studies suggest caffeine may have positive effects on digestion, excessive amounts can lead to digestive discomfort. Weight gain is not a direct consequence of caffeine either; in fact, caffeine is often linked to appetite suppression and increased metabolic rate in the short term. Thus, the symptoms associated with overconsumption are more aligned with nervousness and anxiety, confirming the choice related to this issue.