1. Benefits of coffee:

(1) Coffee contains certain nutrients. Nicotinic acid in coffee contains vitamin B, and roasted coffee beans have higher content. But also free fatty acids, caffeine, tannic acid and so on.

(2) Coffee is good for the skin. Coffee can promote metabolic function, activate digestive organs and play a great role in constipation. Bathing with coffee powder is a kind of hyperthermia, which has the function of losing weight.

(3) Coffee has the effect of relieving alcoholism. Drinking coffee after drinking will quickly oxidize acetaldehyde converted by alcohol, decompose it into water and carbon dioxide and excrete it.

(4) Coffee can eliminate fatigue. To eliminate fatigue, we must supplement nutrition, rest and sleep, and promote metabolic functions, and coffee has these functions.

2. Disadvantages of coffee: The lethal dose of caffeine taken by adults for a short time is 5- 10g, and adverse reactions may occur after taking 1g, mostly symptoms of central nervous system and circulatory system. Early symptoms, such as insomnia, anxiety and excitement, develop into mild coma, vomiting, spasm, muscle tension and tremor, and tachycardia and premature contraction are also common. Besides, you can see that your breathing is speeding up.