Drinking coffee can play a certain role in losing weight, but you can't drink it often. The disadvantages of drinking coffee may lead to skin blackening, affect sleep quality and reduce bone quality, which needs to be comprehensively judged according to factors such as drinking amount and personal physique.

1. Coffee is a common drink with a dark color. If you drink coffee for a long time, it may lead to abnormal body pigment and easy to blacken your skin.

2. Coffee contains a lot of caffeine, which can stimulate the excitement of the central nervous system. If you drink coffee at night, it may also make your body too excited and affect the quality of sleep, leading to poor spirits the next day and affecting your study and work.

3. Coffee has diuretic effect, and some of its components will also lead to calcium loss in the body, which may reduce bone. If you have diseases such as osteoporosis, it may lead to aggravation.

In daily life, we should avoid drinking too much coffee or alcohol, strengthen nutrition in our diet, and appropriately increase outdoor physical exercise to enhance our physical fitness, while maintaining an optimistic attitude and not being overly nervous.