There is no harm in eating coffee beans directly. Coffee beans are not usually eaten directly, but are ground into a powder for brewing coffee. The caffeine content of coffee beans is not formed until they are roasted, and they do not have the distinctive flavor of coffee.

Drinking some coffee can both refresh your mind and improve your work efficiency. But although coffee is good to drink, but should not drink more, especially for some of the neurasthenia of the people, if you drink some more coffee, is undoubtedly worse.

Expanded:

The main substance in coffee is caffeine, which is an active substance. When we drink a cup of coffee, the caffeine inside the coffee will be quickly absorbed and dissolved by the body's intestines, and will also enter the bloodstream and flow to all parts of the body.

This makes the heart beat faster and raises our blood pressure. If you drink coffee for a long time, it can lead to cardiovascular disease, and in some cases, even heart attack. But if you drink coffee normally, it will not have a particularly big impact.