Students who drink coffee once in a while have a relatively small impact on their body, but if they drink coffee for a long time, it may have a greater impact on their body, such as affecting their sleep, growth and development, and inducing diseases, and so on. 1. Affecting sleep: the main component of coffee is caffeine, which can make the central nervous system of the brain in an excited state, affecting the quality of sleep, and some patients may even suffer from insomnia. 2. Growth and development: If drinking coffee for a long time, it may cause calcium deficiency in the body. When the lack of calcium is serious, it is not conducive to the growth and development of bones, especially for adolescents who are in the process of growth and development. 3. Inducing diseases: Coffee adversely affects students with weak gastrointestinal function. Drinking coffee may increase the secretion of gastric acid, which stimulates the gastric mucosa, inducing gastric mucosal damage, for a long time, it is also easy to induce digestive diseases. Therefore, it is generally not recommended for students to consume coffee on a regular basis to avoid adverse consequences. In their daily life, students are advised to consume more fresh vegetables and fruits, meat, eggs, milk and other high-quality proteins, and more food with higher nutritional value, which is more conducive to the growth and development of the body.