The popular three-in-one instant coffee is an industrial synthetic product, which is mainly composed of sugar, lipid coffee partner and coffee. Its nutritional components are not as good as traditional coffee brewed with fresh coffee beans, with high fat and sugar, low quality of protein and caffeine, and the essence of coffee may be lost in the process of making.

For obese people and people who are losing weight, although there are a few reports that coffee has the effect of losing weight, don't drink too much. Because caffeine can promote the secretion of digestive juice, increase appetite and accelerate the digestion and absorption of food. Especially the three-in-one instant coffee, with high sugar content and fat, will be fatter if you drink it carefully. Pregnant women and lactating women should drink coffee carefully to avoid adverse effects on fetuses and newborns.

If the elderly suffer from cerebrovascular disease or diabetes, they should try to drink less coffee. Although caffeine has a cardiotonic effect, it can also accelerate the heart rate and easily cause myocardial hypoxia. If you are a healthy old man, in addition to ensuring not to drink too much coffee, you should also pay attention to properly supplementing high-calcium foods or calcium agents to avoid osteoporosis.

Don't drink coffee on an empty stomach, because coffee will stimulate gastric acid secretion. People with stomach problems, especially patients with gastric ulcers, should be more cautious. The temperature of drinking coffee should not be too high, and 70-80 degrees Celsius is appropriate. At this temperature, the nutrients of coffee are the most stable, not easy to decompose and have the best taste.