The study of the aroma of coffee is refreshing enough.

Drinking coffee is known to keep people awake, but a recent study found that smelling coffee alone can also change the activity of brain cells.

The researchers used animal experiments to observe the effect of coffee smell. In the experiment, some animals do not sleep for a long time, they will become very stressed because of lack of sleep. After smelling coffee, more than a dozen genes and some proteins in the brain changed their "working patterns" and began to reduce stress caused by lack of sleep. The researchers pointed out that in the past, we all focused on the health benefits of coffee ingredients, but this is the first time we have found that the aroma of coffee can also help reduce stress.