Coffee is the world’s most popular stimulant, but why do so many people feel they can’t function without it? Caffeine blocks adenosine, a brain chemical responsible for making us feel tired, leading to increased alertness. Over time, our bodies build a tolerance, requiring higher doses for the same effect.
While moderate coffee consumption offers benefits like improved concentration and antioxidants, excessive intake can lead to anxiety and insomnia. Understanding caffeine’s impact helps us make informed choices about our daily cup (or three) of coffee.
