Caffeine content in a cup of Espresso

In addition to its unparalleled aroma, consistency and rhyme, Espresso coffee has one of its biggest features: low caffeine. When some people drink Esprsso coffee for the first time, they have the illusion that such strong and pure coffee must have a high caffeine content. In fact, on the contrary, of all the coffee-making methods, coffee is made with the same beans, and the coffee made by the Espresso machine contains the least caffeine. Because the caffeine in coffee is a water-soluble substance, the longer the coffee powder is in contact with water, the more caffeine is dissolved, while the brewing time of Espresso coffee is only more than 20 seconds. When the caffeine is not released, a cup of mellow coffee has already been brewed, so the caffeine content is only 1max, 3mer, 1max, which is generally used in other brewing methods.