The very popular 3-in-1 instant coffee is an industrially manufactured product, mainly composed of sugar, non-dairy creamer, and coffee. Its nutritional value is not as good as that of traditional coffee brewed from fresh coffee beans. It is higher in fat and sugar, and lower in high-quality protein and caffeine. The essence of the coffee may be lost during the production process.
For obese individuals and those who are losing weight, although there are a few reports suggesting that coffee has weight-loss effects, it should not be consumed in excess. This is because caffeine promotes the secretion of digestive juices, increases appetite, and accelerates the digestion and absorption of food. This is especially true for 3-in-1 instant coffee, which has a high sugar and fat content, so one should be careful as it may lead to weight gain.
Pregnant and breastfeeding women should be cautious when drinking coffee to avoid adverse effects on the fetus and newborn.
Elderly individuals who suffer from cerebrovascular diseases or diabetes should try to limit their coffee intake. Although caffeine has a cardiotonic effect, it also increases heart rate, which can easily lead to myocardial ischemia. If an elderly person is in good health, in addition to ensuring not to drink too much coffee, they should also pay attention to appropriately supplementing with high-calcium foods or calcium supplements to prevent the exacerbation of osteoporosis.
Do not drink coffee on an empty stomach, as it can stimulate gastric acid secretion. People with stomach ailments, especially those with stomach ulcers, should be even more cautious. The temperature of the coffee should not be too high; the optimal temperature is 70-80°C. At this temperature, the nutrients in the coffee are most stable and less likely to decompose, and the taste is also the best.