Drinking coffee in moderation is good for your health, but drinking a lot of coffee for a long time has many disadvantages, as follows:

First, due to the dark color of coffee, frequent drinking of coffee can easily lead to pigmentation on the skin, resulting in pigmentation spots.

Second, coffee contains a lot of caffeine, which can easily lead to insomnia if you drink it before going to bed at night.

Third, coffee has the effect of diuresis, which can also lead to the loss of calcium in the body, so drinking coffee often is prone to osteoporosis.

Fourth, caffeine in coffee can stimulate vasoconstriction, and drinking coffee often will add to the progress of hypertension, heart disease and other diseases.

Fifth, some coffee contains sugar or some people are used to adding sugar to coffee, which is easy to cause high blood sugar. Diabetes patients are easy to affect blood sugar after drinking, causing blood sugar to rise.

Because there are many side effects of drinking coffee too much, it is not recommended to drink too much coffee at ordinary times, and it is not recommended to drink more than three cups of coffee every day.