The addictiveness of coffee stems from the way that caffeine blocks our normal ability to feel tired, or lose alertness. According to Smithsonian magazine, caffeine is a molecular match for a compound called adenosine, which is normally responsible for signaling it’s time to take a rest. Caffeine stops adenosine from playing this role, making itself an enticing prospect for anybody who needs to stay awake for longer.
Over time, heavy caffeine users have been found to have a higher presence of adenosine receptors in their brains, as the body attempts to calibrate to their caffeine intake—beginning an addictive circle, and side effects when caffeine is cut out.
How to reduce your caffeine addiction without nasty side effects
Those who’ve tried going cold turkey from coffee before will be familiar with the symptoms of caffeine withdrawal. Healthline lists the following annoying, albeit mild, conditions as the most common negative experiences of stopping all of your caffeine intake in one go: