DUBAI – QAHWA WORLD

About half of all American adults started their day with a cup of coffee today, but new insights from health experts suggest that the resulting energy boost might not be coming entirely from the caffeine. Research indicates that for many habitual drinkers, the ritual of the morning cup may be just as powerful as the stimulant itself through what is known as the placebo effect.

  • The Power of the Ritual

According to experts, the simple act of brewing coffee at home or visiting a local coffee shop can activate a placebo response. Maura Fowler, a pediatric and adult dietitian based in Florida, points to a 2025 study suggesting that the energy boost associated with coffee is often tied to the sensory experience—the smell, the taste, and the expectation of alertness.

This is backed by a 2023 study which utilized brain imaging to show that coffee drinkers exhibit increased connectivity in brain regions responsible for vision and problem-solving. Interestingly, this effect was not as pronounced in individuals who took caffeine supplements, leading researchers to conclude that the habit and belief system surrounding the coffee routine significantly influence how the mind and body respond.

  • Physiological Realities vs. Psychological Effects

While the mind may be susceptible to the placebo effect, the body maintains a distinct reaction to caffeine. Dr. Gregory Marcus, a cardiologist at the University of California San Francisco, conducted a randomized trial involving habitual coffee drinkers to monitor heart health. His findings revealed that participants assigned to drink caffeinated coffee experienced more premature ventricular contractions (PVCs)—abnormal heartbeats from the lower chambers of the heart—compared to those drinking decaf.

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Fowler notes that while many switch to decaf to manage anxiety, insomnia, or gastrointestinal issues, even decaf contains small amounts of caffeine—typically between 2 and 15mg per serving—which can still affect those with extreme sensitivity.

  • Individual Differences in Caffeine Metabolism

The report further explains why caffeine affects people differently. Habitual consumption can lead to an increase in adenosine receptors, a substance that promotes relaxation. When these receptors increase, caffeine becomes less effective, often leading users to consume more to achieve the same result.

Genetic factors also play a vital role. In clinical trials, Dr. Marcus found that “fast metabolizers” experienced no impact on their sleep, while “slow metabolizers” (based on DNA samples) suffered from significantly reduced sleep quality on days they consumed caffeinated coffee.

  • Testing the Placebo Effect

For those curious to see if they can maintain alertness without caffeine, Dr. Marcus recommends a structured experiment rather than a sudden change. He suggests a week-by-week rotation between regular and decaf coffee to avoid the immediate “noise” of withdrawal symptoms, such as headaches, low mood, or difficulty concentrating. Research suggests that approximately 8% of adults suffer from “caffeine use disorder,” making the transition more difficult due to symptoms like nausea or insomnia.

The evidence suggests that while caffeine provides tangible nutrients like Vitamin B2, B3, potassium, and magnesium—and is linked to a lower risk of dementia—the placebo effect is powerful enough for many to maintain their routine with decaf without noticing a significant drop in productivity. Experts emphasize that while it is not dangerous to quit caffeine, understanding the psychological connection to the ritual can help individuals better manage their daily consumption.