European Dietetic Information Association survey: how much caffeine is in a cup of coffee?

Abstract: how many cups of coffee should be drunk every day has always been a controversial topic. For coffee consumers, what they want to know most is how much is a cup of coffee? How much caffeine is in a cup of coffee? ABSTRACT: About how many cups of coffee per day is still controversial. A team of scientists has delved into determine exactly what is considered "coffee".

On the official website of the European Dietetic Information Association (Consejo Europeo de Informacion Alimentaria), a clear definition has been given: a 150ml cup of roasted coffee contains 85 milligrams of caffeine. However, in fact, due to different cooking methods, everyone makes different coffee. A recent study in Food & Function confirms that the amount of caffeine in each cup of coffee depends on the type of beans and the way they are cooked. In addition, the report notes that people in special physical conditions, such as pregnant women and people with hypertension, should consume no more than 200 milligrams of caffeine a day.

The content of caffeine depends on the type of coffee beans and the way they are cooked

By studying and analyzing more than 100 kinds of espresso from Britain, Italy and Spain, the researchers hope to find the relationship between caffeine and caffeic acid (ACQ) in coffee. In addition to the general consistency of Italian coffee, the ratio of caffeine to caffeic acid varies greatly in Spain and the UK, depending on the size of coffee and the way it is cooked. The volume of a cup of coffee varies from country to country, so it makes no sense not to talk about how much caffeine a cup of coffee contains according to the specific "amount".

Second, the acid substances of coffee

What is the acid substance of coffee? Coffee beans contain a variety of polyphenols, among which acids account for the largest proportion. Epidemiological studies have shown that regular coffee drinkers can reduce the risk of type 2 diabetes, cardiovascular disease and some cancers, and coffee acids play a role. However, the specific role of caffeic acids remains to be further studied.

Although we have not studied thoroughly the acidity of coffee, the content of caffeic acid in coffee beans is more easily affected by the degree of roasting than caffeine. In addition, the type of coffee beans and the proportion of coffee beans will also affect the content of caffeic acid. For example, a cup of Robusta coffee contains twice as much caffeine as a cup of Arabica coffee.

Therefore, the researchers believe that the packaging of coffee beans should be more clearly marked with relevant information such as the caffeine content of coffee beans for consumers' reference.

Source: red Wine World