1. Full of nutrition
The content of nutrient elements in coffee is amazing, which is especially good for middle-aged and elderly people.
A cup of coffee contains many nutrients such as protein, crude fiber, niacin and potassium.
Although its content does not seem to be much, most people drink more than one cup of coffee a day. That is to say, if you drink 3-4 cups of coffee a day, the total amount of nutrients you consume is already considerable.