Hot water will dissolve faster and more thoroughly than cold water, and the aroma will be more easily emitted, so black coffee brewed with hot water tastes better, while black coffee brewed with cold water may agglomerate.

Black coffee also has a sour taste. Proper heating will produce moderate acidity, which will make coffee taste better and make people feel deeper. The sweetness of black coffee is closely related to the bitterness, so refreshing and superior black coffee tastes sweet.

The benefits of black coffee

What are the advantages of black coffee? Researchers in the Affiliated Hospital of osaka city university found that drinking more than one cup of freshly brewed coffee every day can improve the liver function of patients with chronic hepatitis C, and the research results were published in the American academic journal PLoS One published on 20 13 1 1.

376 patients aged 20-80 with chronic hepatitis C in osaka city university Affiliated Hospital were investigated for the relationship between the change of ALT enzyme quantity (ALT enzyme quantity will increase with the damage of liver cells, which is usually used as an index of liver function) and the frequency of drinking coffee.

The results showed that the ALT enzyme values of patients who drank more than one cup of freshly brewed coffee every day in 1 year were mostly within the normal range compared with patients who did not drink. Moreover, the greater the amount of coffee, the more significant the liver protection effect. The researchers also found that drinking canned coffee drinks, instant coffee and decaffeinated coffee has no corresponding liver protection effect.