喝咖啡的六大迷思 Six Common Myths About Drinking Coffee
Drinking coffee is a daily habit for many people, and there are some myths about coffee that may be confusing. This article helps to further understand the myths about drinking coffee. Indeed, drinking coffee is a personal habit, and people's perceptions and reactions to coffee vary due to individual differences. It is important to adjust the intake of coffee according to one's own body condition and needs while maintaining a balanced diet and a healthy lifestyle. Here are some common myths about drinking coffee:
1. Does Coffee Really Boost Alertness?
In theory, caffeine itself does not have an "energizing" effect; rather, it prevents us from "falling asleep." Adenosine in the body is a substance that can inhibit nerve transmission, and when it begins to be released, people feel sleepy. Caffeine is a purine alkaloid, whose chemical structure is similar to adenosine. When caffeine is consumed, it competes with adenosine receptors, thus preventing the onset of sleepiness.
2. Does Coffee Cause Dehydration?
It is commonly believed that coffee has a diuretic effect, which may lead to dehydration. While coffee does indeed have a diuretic effect, the water intake from consumption still contributes to maintaining fluid balance in the body. Therefore, coffee does not cause dehydration unless consumed in extremely excessive amounts.
3. Is Coffee Bad for the Heart?
Some people used to think that coffee might be associated with the risk of heart disease, but most studies have failed to confirm this association. In fact, some studies even suggest that moderate coffee consumption may be associated with a reduced risk of certain heart diseases. Overseas research indicates that drinking 2 to 3 cups of coffee a day can protect the heart and reduce the risk of heart disease, heart failure, or arrhythmia. Domestic physicians point out that this study is only an observational study, and the mechanism behind it is still unclear. They remind that if palpitations occur after drinking coffee, one should not force it.
4. Does Coffee Cause Osteoporosis?
Some worry that caffeine may affect calcium absorption, thereby negatively affecting bone health. However, most studies have not confirmed a direct adverse association between coffee and bone health. The biggest problem is actually insufficient calcium intake. Research has found that if calcium intake is above 700mg, coffee and caffeine intake are not significantly correlated with the risk of osteoporosis! According to the Dietary Reference Intakes for Taiwanese, the recommended daily calcium intake for adults is 1000mg.
5. Is Caffeine Addictive?
Caffeine is indeed a substance that can produce dependency, but the dependency is usually mild and different from some drugs. Withdrawal symptoms typically include mild headaches and fatigue, rather than serious physical dependency. However, similar situations only occur in people who consume higher amounts of caffeine. In a study with similar results, participants habitually consumed 6 cups of coffee a day, which is different from the coffee consumption habits of Taiwanese people. Therefore, caffeine withdrawal is not likely to be severe in Taiwan.
6. Does Dark Roast Coffee Have More Caffeine Than Light Roast Coffee?
Many people believe that dark roast coffee is more bitter, so it must have a higher caffeine content than light roast coffee! It is true that dark roast coffee has more caffeine in equal weight of coffee powder, but not because it is more bitter. It's because dark roast coffee is lighter, so more coffee beans are used for the same weight of coffee, resulting in a higher total caffeine content!
The impact of these myths may vary from person to person. If you have specific health concerns or worries, it is best to consult a professional doctor's advice before making any changes to your diet. Coffee is a beverage rich in phytochemicals, and light roast coffee contains abundant nutrients such as chlorogenic acid, which have effects such as assisting fat metabolism and blood sugar regulation. Therefore, drinking coffee moderately and without adding sugar or milk is a healthy way to drink coffee. Most importantly, while enjoying the floral and fruity aroma of coffee, your mood will be uplifted, and in that relaxed moment, you will feel rejuvenated, wandering in the fragrant world, which is the best emotional nourishment for yourself.
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