The basics of coffee

First, can the skin blacken when drinking coffee?

A: so far, no study has shown that there is an absolute relationship between melanin in coffee and melanin in the skin. on the contrary, caffeine speeds up metabolism. Promote digestion. Improve constipation, most of these functions, but also can assist the rough phenomenon of the skin. When it comes to caffeine speeding up metabolism, there is a saying that coffee will accelerate the burning of calories to achieve the function of weight loss; basically, the theory is right, but this kind of calorie burning is not enough to make weight loss a lot. If sugar and cream are added to the coffee, the calorie calculation is even less suitable for the principle of weight loss.

Second, how to store coffee beans?

A: improper retention will affect the quality and flavor of coffee. Generally speaking, the coffee after opening is discarded-the coffee beans are four weeks old, and the coffee powder is slightly shorter. Vacuum-packed coffee beans can last up to four months if they are not unsealed. Storage packaging is a great knowledge in order to minimize the physical and chemical changes of coffee. The coffee beans purchased home should be stored in a sealed container and refrigerated in the refrigerator. Remember to sprinkle a small amount of salt in the bucket where the coffee is stored. (do not remove the bag of packaged coffee so as not to assimilate the coffee and salt to make the coffee taste salty.) it helps to retain the fragrance of coffee.

Is it the most impressive when purchasing? Choose a breathable bag with an extra one-way vent on the sealed package so that the gas from the beans or coffee powder can be discharged, but the outside air does not go away. Because the retention date of coffee powder is shorter than that of coffee beans, if you study the coffee powder before brewing coffee, it will help to ensure the novelty of coffee beans and maintain the aroma of coffee.

Third, will coffee cause calcium loss?

A: in recent years, in the promotion of medical health care, many people have begun to pay attention to the problems of missing calcium flow and osteoporosis. The relationship between caffeine intake and osteoporosis is still being studied continuously. There is no direct evidence that caffeine can lead to osteoporosis, but some studies have shown that caffeine can increase calcium exudation. Therefore, the current suggestion is that happy coffee lovers should eat more foods high in calcium to fill calcium. If you can drink milk before drinking coffee, you can also reduce the loss of calcium in the body.

4. Iced coffee (such as IcedMocha, IcedCappuccino)

Would you like to cook it with iced coffee beans or with ice?

A: iced coffee is made from iced coffee beans. It is most appropriate to add ice after cooling (at room temperature). If ice is added to cool the coffee, if the ice melts too much in the coffee, the coffee becomes too thin. IcedMocha refers to iced coffee with chocolate syrup in it. Mocha means coffee with chocolate. IcedCappuccino refers to iced coffee in addition to sugar and milk plus a special spice, so the mouth and stomach is more extraordinary.

Fifth, should the coffee be drunk while it is hot?

A: some people say that the best drinking opportunity for hot coffee is 85 degrees Celsius, which is not good when it is cold. In fact, if it is a good cup of coffee, the implication of the taste should be the same when the temperature is high and low, which is why the anatomist who tested the coffee will evaluate the whole process of the coffee from hot to cold. After cooling, in addition to the reduction of fragrance, the implication of the taste will be even better than the temperature. Just because the quality of coffee is invariant, some people encourage people to drink it while it is still hot to avoid cooling changes that affect the flavor of coffee. On the other hand, when a steaming cup of coffee is served in front of you, drinking it while it is hot is a kind of etiquette in response to the coffee maker's mind.

Why can black coffee without sugar be infected with a little sweetness?

A: most people think that coffee beans only taste bitter. Sour。 There are three kinds of astringent beans. in fact, raw coffee beans contain about 5% to 8% sugar. after baking at high temperature, most of the sugars will be converted into caramel. this caramel is dyed into a strange brown color of coffee, forming the origin of fragrance and bitterness. The remaining sugar leaves a slight sweetness, and a slightly bitter sweetness occurs when the tannins released when roasting good coffee beans are linked to brown caramel.

Why can't you sleep easily when you drink coffee?

A: many people have the experience of being too excited to sleep after drinking coffee. this is because there is a tool in the human body to shout sweet and sour, which is a conductive substance to control nerve activities and can slow down breathing. Emotion weakens. Reduce the need for gastric acid exudation and urination; and the caffeine contained in coffee will be filled with adenylate, making the body feel that adenylate impregnation has already occurred, but in fact, adenylate does not reincarnate, so it does not suppress the occurrence of impregnation, so on the contrary, you feel energetic. Stomach acid increases. Urinate more frequently. Because of emotional excitement, you will feel sober, since the cripple M is not easy to fall asleep. It is worth noting that the brief awakening caused by this caffeine does not suggest that physical strength is actually restored. In addition, because everyone has different metabolic rates of caffeine, their sensitivity to caffeine varies, so some people still don't feel any effect on their sleep after drinking coffee.

What kind of water should be used to make coffee?

A: about 98% and 99% of a cup of coffee is water, so make good coffee and make wine. Just like making tea, the excellent water quality can flash the fragrance of coffee. So does the more delicious mineral water match the coffee? Because most mineral water contains sodium. Manganese. Calcium. Hard water with high magnesium will break down the release of caffeine and tannic acid, which will greatly reduce the taste of coffee. In addition, to avoid using water with disinfectant odor, you can use the water that is boiled for the second time and the water from the faucet that has just flowed early in the morning. And the most suitable for brewing coffee should be boiled water heated on a gas stove, which still has a little carbon dioxide left. It can show the sweetness of coffee.

What is a good cup of coffee?

A: coffee is a personalized drink. As long as the coffee beans used are of good quality, novel and roasted professionally, any kind of coffee that suits your mouth and stomach is good coffee.

A good cup of coffee does not depend entirely on the origin of the beans and the way they are brewed. And so on, but depends on the drinker's own personality, mouth and stomach preferences. For example, we can often see cup after cup of American coffee drinkers in American restaurants or movies. American coffee is sometimes described as "sock washing water" because it tastes light, but these people enjoy it. This means that the definition of good coffee depends entirely on the happiness of the ego, and it is absolute egoism.

What is the "three original species" of coffee?

A: among the many plants on earth, there are at least 40 species of coffee, but the more suitable cultivated species are the so-called three original species, which are Arabica respectively. Robsta species (Robustra). Liberia card species (Liberica), and now this order is the order of their quality quarrels. The Arabica species with the best fragrance has only half the caffeine content of the robusta species, which currently accounts for about 70% to 80% of the world's total output, while the robusta species is heat-resistant. It is rainy. Less rain, strong compliance, low cost, output also has 20% to 30% of the total output. Liberia card is not popular except for producing countries and a small number of Europeans because of its unsafe aroma and strong bitterness.

11. How to taste coffee?

A: drinking coffee should be like tasting a cup of Wine. Only through careful taste can you appreciate its refinement.

No matter what method you use to brew out the coffee, you don't have to rush into it. First smell the original fragrance of the coffee, then take a sip to try the original taste, and then according to the happiness of the individual like to intervene in the right amount of sugar, and stir with a small spoon, taking advantage of the stirred coffee whirlpool, gradually intervene in the cream, let the oil float on the coffee, on the one hand, keep warm, on the other hand, the heat of the coffee can also evaporate milk fragrance.

Coffee should be drunk while it is hot, because its taste and fragrance will be reduced as it cools. Drink coffee not only at the right temperature but also with the right amount of noodles, which is generally injected into the cup of about seven or eight points, the right amount not only makes the taste alive, but also neat and light when drinking. Following this style of taste, the coffee you taste will become more and more delicious.

Is drinking "black coffee" the best way to taste coffee?

A: there is a saying that drinking coffee is that you know how to drink without cream. Black coffee without sugar is good at tasting coffee. In fact, coffee is not the right way to drink coffee, coffee hometown of Ethiopia, "coffee path", but also to add ginger. Cinnamon and other spices are featured. In the case of a good cup of coffee, the tasting style of black coffee can simply enjoy its original balanced and strong flavor, while sugar and cream can make up for the shortcomings of some coffees. for example, cream can remove a little astringency, and adding sugar can turn bitterness into sweetness.

13. Can a pregnant woman drink coffee?

A: in 1980, the United States Food and Drug Administration (FDA) issued a statement advising women who are or may be pregnant to reduce their caffeine intake. However, many subsequent studies have suggested that there is no evidence to show that a moderate amount of caffeine can have an unlucky effect on the fetus, and there is no medical statement prohibiting pregnant women from drinking coffee, but FDA has not changed its original advice, because pregnant women metabolize caffeine twice as fast during the second and third stages of pregnancy than when they are not pregnant, and caffeine crosses the placenta into the fetus. It will also flow into the baby through breastfeeding, so it is recommended that pregnant women should be as strict with their caffeine intake.

Why does some coffee taste sour?

A: whether coffee tastes sour or not is mostly due to the variety of coffee. Some coffees have higher acidity, such as Kenya, Mocha, Colombia, Guatemala and CostaRica.

The level of roasting is also related to the concavity and convexity of coffee acidity. Lightly fried coffee beans also contain organic acids, so the coffee washed out tastes sour, while deep-fried coffee beans, because the high temperature of stir-frying beans has released the organic acids contained in coffee beans, so the acidity of the coffee is low. Coffee in brewing (especially the use of "plug" brewing) too many times of stirring or brewing coffee in the heat preservation plate for too long time is the cause of coffee will be sour.

How to buy coffee beans?

No matter what kind of coffee beans, novelty is the main factor affecting the quality. When shopping, grab one or two coffee beans and chew them in your mouth. If there is a crisp sound (implying that the coffee beans are not damp) and the teeth and cheeks smell good, it is best to squeeze them with your hands to feel whether they are solid, rather than buying empty-shell coffee.

If the coffee bean has lost its fragrance or smelled too old, it implies that the coffee bean is no longer novel and is not suitable for purchase.

Freshly fried coffee beans are not suitable for immediate consumption and should be stored for a week to completely release the gas from the beans.

Generally speaking, the best drinking period for coffee is a week after stir-frying, when the coffee is the most novel and the Aroma taste is the best.

In addition, the purity of coffee beans is another consideration. It is not necessarily to look at the size of the particles, but to grab a handful of individual coffee beans (RegionalCoffee), about dozens of portions, to see whether each single bean has the same color, particle size and shape, so as to avoid buying inferior products disguised as mixed beans. But if it is a comprehensive bean (BlendedCoffee), the difference between size and Sinorama is a normal phenomenon. In addition, heavy heat and medium-deep roasting will cause coffee beans to produce oil, but if the lightly roasted beans produce oil, it implies that they have gone bad, not only reducing the aroma, but also showing astringent and sour taste. In short, when buying added coffee, we should pay attention to its novelty, fragrance and stale flavor, and the ideal purchase number is to be able to drink it in half a month.

16. How to brew coffee with excellent flavor at home?

A: with regard to the knowledge of brewing coffee, according to the head of a coffee shop, it is necessary to be able to fill the enchantment. Explain the essence of coffee, at least through a year of complete professional practice, and at present there is no such training situation in China. If you want to brew a cup of instant coffee at home, here is a little secret for you: first put a little warm milk into the pot, then put in the right amount of coffee powder and boiled water (the proportion is about 3G coffee powder plus 140c.c. Boiled water), heat to a little boil (pay attention not to boil completely), turn off the fire, and then add sugar according to personal happiness. This way can eliminate the peculiar smell of instant coffee by milk at the bottom, and make the coffee more mellow.