What impact does caffeine have on the body? Detailed explanation of how to get good coffee and not overdose

Health     9:24am, 22 July 2025

It is a common sight in offices that you hold a cup of coffee every morning, but few people know what impact it actually has on you, such as how quickly will caffeine work? Or how can caffeine wake you up? Is it safe to drink too much coffee? The following are FAQs and answers related to caffeine.

How fast does caffeine work?

The effect may begin before you drink coffee. According to a 2019 study of 80 people aged 18 to 22, inhaling only the aroma of coffee can improve memory and stimulate vigilance. Another study in 2018 found that the subjects had better performance in analytical reasoning tests after they found that the subjects had found a coffee-like smell. However, the researchers said this effect should contain a placement component.

What happens when you actually drink coffee? A 2008 study found that the vigilant effect of a cup of coffee could occur 10 minutes after retrieval, but the highest concentration of caffeine in the blood occurred 45 minutes later. The researchers said the effects of caffeine will last two to three hours, but there will be a big difference depending on the quality and recognition rates of different individuals.