The daily amount of coffee can be calculated not by the number of cups, but by the actual caffeine content of the drink, which depends on the brewing method and the type of coffee bean. This was announced by Christopher Hendon, associate professor of chemistry at the University of Oregon (USA). His comments were quoted by the Daily Mail.
According to the scientist, relying only on the number of cups is wrong. The concentration of caffeine plays an important role. For example, a single shot of espresso contains an average of 40 to 80 milligrams of caffeine, while a cup of filter coffee contains up to 150 milligrams. This is due to the longer contact time between the ground coffee and the hot water; the longer the contact time, the more caffeine is "absorbed" into the drink.
According to World Health Organization (WHO) recommendations and most international standards, the safe daily intake of caffeine for adults is no more than 400 mg.
Hendon noted that drinks with short extraction times, such as espresso, cappuccino and latte, are usually weaker than filter coffee. They contain less caffeine and herbal compounds. However, he said that espresso and 100ml of instant coffee can have about the same caffeine concentration, around 2%.
The type of bean also affects the caffeine content. Arabica, the most common type in the world, contains less caffeine and has a milder taste with acidic and fruity notes. Robusta, on the other hand, has almost twice as much caffeine. These beans have a more bitter, coarse taste and are more commonly used in strong blends and instant coffees.
Translation: Euromedia24.com-in:
