Truth: "good coffee" doesn't keep you awake all night.

Customers who come to Xiao Xu's shop for coffee, especially at night, will always hear them say: Don't drink coffee, or you will lose sleep again. I wonder if coffee is really that exciting?

In fact, good coffee is not so much stimulation, of course, it is also to be divided into physical terms, but also to drink coffee quality. Today we will analyze specifically whether drinking coffee will make you sleepless all night.

First: in normal people's constitution, after drinking coffee, caffeine in the body half-life is about three hours, after the half-life, almost to the body or nerve stimulation can be ignored, if drinking coffee, a lot of hydration, drainage, may not be in the body for more than two hours, how can you sleep all night?

Second, we need to specifically analyze the quality of the coffee we drink.

Coffee contains a variety of ingredients, extraction is not to extract all of these ingredients, there is usually such a rule: if the coffee powder amount is certain, then the amount of soluble ingredients extracted by grinding degree and time to determine. The finer the ground coffee powder, the longer the extraction time, the more ingredients you get. According to experiments, if all the ingredients that can be extracted from a certain amount of coffee powder are extracted, up to 30% of the ingredients can be extracted. But not all of these ingredients are what we need. Coffee has ingredients we need and ingredients we don't need, and the longer it takes to extract, the easier it is to extract the bad ingredients we don't need.

That is to say, if the operation is not correct, or the coffee extraction is not correct, it will cause the precipitation of irritating substances.

Among these ingredients, the most important one we don't need is "tannin", the correct name should be tannic acid. Green coffee beans contain 8% to 9% and roasted beans contain 4% to 5%. Like caffeine, it has the property of being decomposed at certain roasting degrees. Bake to a depth around French or Italian, and 90% of the tannins will break down.

The average person will think that deep roast coffee is strong and light roast coffee is weak. This idea is completely wrong. It is mistaken that light roast coffee is weak. If you quote it before going to bed, it will definitely make you open your eyes until dawn! The deeper the roast, the less caffeine and tannin. The irritation will also decrease. Don't be fooled by the color of coffee.

Tannins, which we don't want to extract, are also responsible for coffee astringency. Tannins are angels and demons, a small amount of tannins, can play a coffee sweet and mellow, a small amount of coffee tannins and a wide range of antibacterial effects! But incorrect roasting, or roasting too shallow combined with the wrong extraction caused by the increase in the amount of tannins, the devil will play a role, not only make coffee full of astringency, but also make you sleepless at night.

Coffee irritation is not only caused by the maker or roaster, but often the wrong drinking method of the drinker is also one of the reasons for the irritation. Coffee needs to be drunk quickly, and it is best to drink it while the coffee is still warm. The irritability of coffee is often released as the coffee temperature decreases.

Therefore, good coffee, that is, under the premise of correct roasting, correct operation, correct extraction, timely drinking, can reduce the irritation of tannins or caffeine, even if you drink coffee at night, you can sleep well.

Source: Xiao Xu's Cafe