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By the time you finish watching this video, eight million cups of coffee will have been drunk all over the world.
Explore coffee's history, cultural impact, and how caffeine affects the body and brain in this BBC World Service video.
Key Takeaways
- Coffee has a deep historical and cultural significance beyond just being a beverage.
- Caffeine stimulates the nervous system by blocking adenosine, leading to increased alertness and mood improvement.
- Coffee consumption contributed to major social changes including the Enlightenment and capitalism.
- The coffee industry is a massive global economic and social force today.
- Caffeine's physiological effects are temporary but impactful on concentration and physical performance.
Summary
- Coffee has been consumed for over 1,500 years and played a role in fueling the Enlightenment.
- The main active ingredient in coffee is caffeine, the most widely consumed psychoactive drug globally.
- Coffee originates from the Coffea arabica plant native to Ethiopia, with early use traced to Yemen.
- Coffeehouses in Europe became hubs for discussing business, politics, and new ideas, influencing thinkers like Kant and Voltaire.
- Coffee fueled the slave trade, with plantations in Haiti and Brazil relying on African slaves for production.
- Coffee consumption influenced capitalism by increasing worker productivity through coffee breaks.
- Today, two billion cups of coffee are consumed daily, making it a $90 billion industry and a social staple worldwide.
- Caffeine is absorbed through the intestine into the bloodstream and affects the nervous system by blocking adenosine receptors.
- Blocking adenosine receptors increases alertness, brain activity, mood, and physical performance while suppressing hunger and fatigue.
- Caffeine effects last from 15 minutes to two hours, with the body eliminating it within five to ten hours.
Chapters
- 00:00Introduction and global coffee consumption
- 00:08Historical origins and early coffee use
- 00:49Legend of Kaldi and early coffee preparation
- 01:22Rise of coffeehouses and their cultural impact
- 02:22Coffee and the Enlightenment
- 02:51Coffee's role in the slave trade and capitalism
- 03:44Modern coffee industry and social significance
- 03:58How caffeine affects the body and brain
- 04:40Physiological effects and duration of caffeine
Full Transcript — Download SRT & Markdown
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Coffee has been consumed for at least 1,500 years, and some say its impact is so great that it helped fuel the Enlightenment, which gave rise to some of the big ideas that underpin the world as we know it. The main active ingredient of coffee is
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caffeine, which is considered the most widely consumed psychoactive drug on the planet. So where does coffee come from, and what does it do to us when we drink it? Coffee comes from the fruit of the
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Coffea arabica plant that originated in Ethiopia. One story claims a ninth-century goat
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herder called Kaldi saw his goats were more full of energy after eating coffee berries — so he had a bite too. Historic records suggest the Sufis of Yemen roasted the seed of the coffee berry to create the beverage we recognize today.
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In the 15th century, the first coffee houses began to appear across the Ottoman Empire before spreading to Europe in the following centuries. Coffeehouses in Europe became a
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space for discussing business, politics, and new ideas.
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One academic - Jürgen Habermas – even says without coffee we might not have had the Enlightenment.
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Philosophers like Kant and Voltaire - who is said to have drunk as many as 72 cups a day - started to question the Catholic Church’s interpretation of the world.
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Instead, they looked to science, believing that everything in the universe could be rationally explained. This so-called Age of Enlightenment
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radically changed the world as we knew it. It led to the overthrow of monarchs, the growth of democracy, and numerous scientific discoveries.
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Coffee also fueled the slave trade. The French used slaves from Africa on plantations in Haiti, and by the early 1800s, Brazil was producing a third of the world’s coffee using African slaves.
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Did coffee give rise to capitalism too? Companies started giving away coffee to their workers and eventually let them have coffee breaks. This wasn’t an altruistic move.
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They were trying to increase worker productivity. Fast forward to the present, and two billion cups of coffee are consumed every day.
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It’s a $90 billion a year industry. And, more than that, it is a fundamental social part of everyday life for billions of people.
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So how does coffee impact the body? When caffeine enters your digestive system, it is absorbed via the intestine into the bloodstream. But the effects only start when caffeine
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hits the nervous system. This happens because caffeine has a chemical structure very similar to that of a substance produced by our own body:
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adenosine. Caffeine binds to the body’s adenosine receptors, which can be found on the surface of nerve cells.
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It's like a key opening a lock. Adenosine is known to slow down the sympathetic nervous system - it reduces your heart rate and generates a state of drowsiness and relaxation. By blocking these receptors, caffeine
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generates the opposite effect. Your blood pressure, for example, may
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increase slightly, especially if you are not used to drinking coffee often. The same goes for brain activity: caffeine stimulates the brain, suppresses hunger, and helps you stay in a state of alertness, so you
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can concentrate for longer. Caffeine can have a positive impact on
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your mood, inhibit feelings of fatigue, and can improve physical performance.
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So, many athletes use it as a supplement.
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These effects can last between 15 minutes and two hours. The body removes caffeine five to 10 hours after consuming it, but caffeine’s residual
Topics:coffeecaffeinehistory of coffeeEnlightenmentcoffeehousesslave tradecapitalismcaffeine effectsBBC World Servicecoffee culture
