Lifetime: Caffeine has a half-life of about 3 to 5 hours in the human body. This means that after this time, half of its amount will have been metabolized and eliminated. This is why some people can drink 5 or 6 cups a day.
Caffeine level: The percentage of caffeine in a cup depends mainly on the extraction time, for example, an espresso that is usually concentrated, on average lasts 30 seconds in its extraction, while a filtered coffee can last up to 2 minutes; this makes the filtered one have up to double the caffeine. If you needed an espresso to wake you up more in the morning, it is time to change the method.
Physical and mental effects: In addition to being stimulating, caffeine also has other effects on the body and mind. For example, it has been shown to increase concentration and metabolism, the latter of which can help in fat burning efforts. However, do not overdo it, as you may experience effects such as nervousness, anxiety or insomnia. Each body resists differently to this substance.
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