India, May 28 -- Why does coffee wake us up? Is it because it contains caffeine, or is it because we are used to it waking us up after drinking it? A study published on Heliyon on January 30, 2025 attempted to answer this question. Researchers found that habitual coffee drinkers may develop conditioned responses, where the mere act of consuming coffee triggers physiological changes regardless of whether caffeine is actually present. Also read | Fitness coach says 'if you drink coffee every morning you are technically doing drugs on a daily basis': But is it true?

Effects of caffeine on the human body are intensely researched, though pros and cons of caffeine are still debated. But the new study's findings suggest that regular coffee cons...