The Impact of Caffeine on Sleep, Anxiety, and Heart Health
Caffeine is the world’s most widely consumed psychoactive substance, found in coffee, tea, energy drinks, chocolate, and even some medications. While moderate caffeine consumption can enhance alertness, concentration, and physical performance, excessive intake may negatively affect sleep quality, mental health, and cardiovascular function . Understanding how caffeine interacts with your body is essential to harness its benefits while minimizing risks. 1. How Caffeine Works in the Body Caffeine primarily acts as a central nervous system stimulant . It blocks adenosine receptors , which are responsible for promoting sleep and relaxation. By inhibiting adenosine, caffeine temporarily reduces fatigue and increases alertness. Other physiological effects include: Increased heart rate and blood pressure Release of stress hormones such as cortisol and adrenaline Enhanced metabolism and fat oxidation during exercise The effects of caffeine vary based on genetics, age, tolerance, and...
