Caffeine can stimulate sympathetic nerve, stimulate gastrointestinal secretion of gastric acid, promote digestion, prevent bloating and gastroptosis, promote gastrointestinal hormones and peristalsis hormones, and make them pass quickly.
Although drinking coffee on an empty stomach will have the effect of losing weight, it is because after a night's rest, when drinking coffee on an empty stomach in the morning, caffeine will stimulate the stomach, affect the normal nutrient absorption of breakfast, and eventually lead to weight loss. However, this is a very unhealthy practice, especially for people with gastric ulcer and heartburn symptoms. Drink less coffee or try not to drink coffee, otherwise it will aggravate gastrointestinal discomfort.
Caffeine can excite the heart muscle. After drinking coffee, people who are sensitive to caffeine will lead to a sharp rise in the concentration of caffeine in the blood, which will stimulate the central nervous system and cause mental symptoms such as dizziness, rapid heartbeat, excitement and anxiety.
Caffeine can shorten the effective refractory period of atrioventricular node, thus causing various tachyarrhythmias and premature beats. Therefore, if you feel flustered, flustered and dizzy after drinking coffee, you should reduce or avoid caffeine intake. People in sub-health state, people who often stay up late should not drink a lot of coffee for a long time, and patients with hypertension and heart disease should not drink coffee.
Extended data:
Precautions for drinking coffee:
1, avoid drinking coffee when smoking.
Caffeine in coffee can easily change some tissues and cells of human body and even induce cancer under the action of induced substances such as nicotine in cigarettes.
2. Avoid drinking coffee when smoking.
Caffeine in coffee can easily change some tissues and cells of human body and even induce cancer under the action of induced substances such as nicotine in cigarettes.
3, coffee with sugar should be appropriate.
There are many reports that drinking coffee can help you lose weight, because caffeine in coffee can make people more excited, thus promoting the burning of calories and playing a role in losing weight. However, after trying the "coffee diet", many people find that they are not thin, but fat.
In fact, this is because most people add a lot of coffee partners and sugar when drinking coffee, and both partners and sugar can bring a lot of energy, so the amount of calories that caffeine helps the body burn is somewhat insignificant. Therefore, in order to prevent excessive calorie intake, it is best to drink less sugar when drinking coffee.
Don't drink coffee when you are nervous.
If you drink coffee when you are nervous, it will often make things worse. Caffeine helps to improve alertness, sensitivity and memory, but drinking coffee when nervous can make people feel anxious and have negative effects. For people with anxiety tendency, caffeine can aggravate the symptoms of sweating, palpitation and tinnitus.
5. Try not to use a coffee partner.
Coffee partner smells good, but it's not good for your health. If you carefully observe its ingredient list, you will find that it contains "non-creamer", which is usually made of glucose syrup, hydrogenated vegetable oil and sodium caseinate, as well as three food additives: stabilizer, emulsifier and anti-caking agent.
However, hydrogenated vegetable oil contains trans fatty acids, which is more dangerous than saturated fatty acids, which is recognized in the field of nutrition at present.
Trans fatty acids have four major hazards: increasing blood viscosity and cohesion and promoting thrombosis; Increase low-density lipoprotein cholesterol (bad cholesterol), reduce high-density lipoprotein cholesterol (good cholesterol), and promote arteriosclerosis; Increase the incidence of type II diabetes and breast cancer; It affects the normal growth and development of infants and adolescents, and may have adverse effects on the development of the central nervous system.
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