How much caffeine is there in coffee beans? Which coffee drink contains the highest amount of caffeine?

"which coffee has the least caffeine on the menu? "" I'm dying for coffee, but I'm afraid I can't sleep at night. "

In the eyes of most people, coffee is a refreshing drink, but its own aroma also attracts a group of delicious friends, including those who are not tolerant of caffeine but are "greedy", such as the guest mentioned at the beginning of the front street. Today, in front of the street, we will talk about the caffeine content of all kinds of coffee and people's misunderstandings about caffeine.

What determines the caffeine content of a cup of coffee?

How much caffeine a coffee bean contains depends first of all on its variety and altitude. For the two most common coffee varieties, Robusta accounts for about 2.4% of its caffeine, while Arabica accounts for about 0.9-1.4%, which is usually only half that of Luodou. Most of the regular freshly ground coffee on the market are Arabica varieties, and only a few add a small percentage of Luodou to the mix in order to make espresso richer in fat.

The higher the altitude, the lower the caffeine content. High-altitude planting areas have lower temperatures and fewer diseases and insect pests, and coffee trees do not need to secrete too much caffeine to resist insect pests. This also explains why robusta grown at low altitudes contains so much caffeine, so this standard is mainly for Arabica species.

Qianjie used to be popular science, when making coffee, the lighter flavor molecules will be released first, while the heavier macromolecules will be integrated into the water later. Caffeine with the chemical formula "C8H10N4O2" is a high-mass molecule, so like flavor substances, the amount of caffeine released is related to the extraction time. That is, the longer you soak, the higher the caffeine.

Therefore, espresso drinks are not the highest in caffeine, while hand-brewed coffee and French presser-based soaked coffee have slightly higher caffeine content. Although cold extraction and ice drop coffee are extracted at low temperature, the caffeine content is higher than the previous ones because of the long extraction time.

The following is a general reference to the caffeine content of common coffee categories in Qianjie according to the amount of coffee produced every day:

Espresso (20g powder / 40g coffee) about 100mg; (latte, American, cappuccino coffee, etc.) about 90mg; French presser (20g powder / 195ml coffee, 2 minutes) about 135mg; ice drop coffee (a cup of 20g powder / 200ml coffee, 8 hours) about 135mg; cold extract coffee (a cup of 20g powder / 200ml coffee, 12 hours) about 140mg; hanging ear coffee (a bag of 10g powder / 120ml coffee) about 50mg; instant coffee (one bag) about 50mg.

Misunderstanding about caffeine

On the Internet, there are often popular science articles telling us that an adult should not consume more caffeine than 400mg every day, otherwise it will affect his health. Friends who are sensitive to caffeine will think about how to calculate the specific amount of caffeine through the drinks they drink, so as to avoid excessive intake. So they ask, "how much caffeine is there in a cup of coffee?" "

You know, from the barista's point of view, in addition to the variety of coffee, the altitude of planting and the duration of brewing, a number of factors that affect the extraction of coffee also determine the amount of caffeine it contains. Take hand flushing as an example, the degree of grinding, water temperature, water injection methods, powder ratio will directly change the extraction of caffeine, so it is difficult to measure with specific values.

Misunderstanding about caffeine II

Qianjie noticed that some friends think that caffeine is related to the degree of baking. They think that the deeper the roast, the lighter the coffee beans. when beans of the same weight are brewed, more deep-roasted coffee is needed than light-roasted beans, and the structure of deep-roasted beans is more fluffy and easier to extract flavor substances. so they feel that deep-roasted beans contain more caffeine and have a more refreshing effect.

However, many studies have shown that the degree of roasting of coffee beans actually has little effect on caffeine. At this time, some friends who have experienced it may say: they do drink deep-baked coffee to refresh themselves. Then it can only show that in your subconscious, compared with the soft sour coffee, only the bitter coffee with a thick taste can refresh you. This is why many people mistakenly think that Italian concentrated caffeine is the highest.

Want to drink coffee, but do not want to eat caffeine, how to do?

For some friends who are intolerant to caffeine, whether it is instant coffee, bottled coffee, freshly ground Italian coffee, drip-filter hand-brewed coffee, or ice drops and cold extracted coffee extracted for a long time, the caffeine content of these drinks is still relatively high. It's easy to get to sleep. If you really want coffee, but do not want to eat caffeine, you can choose artificial decaffeinated coffee, this kind of coffee beans contain almost no caffeine.

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Front Street Cafe

No. 10 Baoqian street, Yandun road, Dongshankou, Yuexiu district, Guangzhou, Guangdong province