There are various ingredients of coffee.

Caffeine: Caffeine is the most noticeable of all coffee ingredients. It belongs to a kind of plant xanthine (animal muscle component). Its nature is the same as theobromine contained in cocoa. The theophylline contained in green tea is the same. After baking, the percentage of reduction is extremely small. The effect of caffeine is extremely extensive, which will affect various parts of the human brain, heart, blood vessels, gastrointestinal tract, muscles and kidneys. An appropriate amount of caffeine will stimulate the cerebral cortex, promote sensory judgment, memory and emotional activities, make the myocardial function more active, expand blood vessels and enhance blood circulation. And improve metabolic function, caffeine can also reduce muscle fatigue, promote the secretion of digestive juice. In addition to this, because it also promotes kidney function to help the body expel excess sodium ions (chemical components that hinder water molecule metabolism), caffeine will not accumulate in the body like other narcotic and excitatory substances (narcotic drugs, paint solvents, stimulants, etc.), and will be excreted in about two hours. Coffee flavor in the biggest special burn-bitter, is caused by caffeine.

Tannin acid: tannin acid after extraction will become pale yellow powder, very easily into water, boiling it will decompose and produce coke Wu acid, so that coffee taste worse, and if brewing good and put on a few hours coffee color will become stronger than just bubble good, but also less flavor, so there will be "brewing good best drink as soon as possible" saying.

Fat: Coffee contains fat, which plays an extremely important role in flavor. After analysis, it is found that coffee contains many kinds of fat, among which the most important are acidic fat and volatile fat. Acidic fat refers to the acid contained in fat. Its strength will vary according to different types of coffee. Volatile fat is the main source of coffee aroma. Roasted coffee beans contain fat which, when exposed to air, undergoes biochemical changes that make them less flavorful.

Protein: The main source of caroli is protein, and like coffee brewed by dripping, most of the protein will not dissolve out, so the nutrition obtained by coffee drinking is also limited, that is, coffee will become the reason for weight loss.

Sugar: In the absence of sugar, in addition to the bitter taste of caffeine and the sourness of tannin, you will also feel the sweetness, which is caused by the sugar contained in the coffee itself. After roasting, most of the sugar will turn to caramel, giving the coffee its distinctive brown color.

Minerals: lime, iron, sulfur, sodium carbonate, phosphorus, chlorine, silicon, etc., due to the proportion of very little impact on the flavor of coffee is not large, combined to bring only a little astringency.

Coarse fiber: the fiber of raw beans will be carbonized after roasting. The caramelization of this carbon and sugar combines with each other to form the color of coffee, but the fiber turned into powder will bring a considerable degree of influence on coffee flavor. Therefore, we do not encourage the purchase of powdered coffee beans, because it is less able to taste the flavor of coffee.

Coffee bergamot: The color, aroma, and taste of coffee are caused by complex chemical changes that occur during roasting. Therefore, raw beans must undergo appropriate chemical procedures to achieve the most balanced state of its essential ingredients in order to be considered the best baked beans. Coffee aroma changes with heat, so roast time should be as short as possible, and heat control can make coffee beans produce effective chemical composition of the minimum temperature, that is, the shortest process time and heat, so that coffee beans produce the most suitable composition ratio.

Aroma: Aroma is the life of coffee quality, but also the best performance of coffee production process and roasting technology, production climate, elevation, variety, refining treatment, harvest, storage, consumer country roasting technology is appropriate, etc., are about coffee bean aroma conditions. The aroma of coffee was proved to be composed of several hundred volatile components such as acids, alcohols, aldehydes, ketones, esters, sulfur compounds, phenols and nitrogen compounds. Roughly speaking, fat, protein, and sugar are important sources of aroma, while lipid components will blend with the bitterness and sourness of coffee to form a smooth taste. Therefore, the disappearance of aroma means that the quality is poor, and the relationship between aroma and quality is extremely close.

China Coffee Trading Network: www.gafei.com