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2. Regarding whether it is suitable for drinking coffee on an empty stomach in the morning, it is said that coffee will lead to excessive gastric acid secretion, and an empty stomach will stimulate the stomach, leading to heartburn, nausea, vomiting, ulcers and indigestion. However, everyone's physique is different. If your stomach is sensitive and you often have the problem of drinking coffee on an empty stomach, you can try to change this habit and drink it with meals or after meals.
In addition, a recent study by the University of Bath found that after a bad night's sleep, drinking coffee before breakfast in the morning may lead to an increase in blood sugar after a short meal. In other words, in this case, coffee may weaken the human body's tolerance to blood sugar.
4. Although the principle of this is not clear, the researchers speculate that this short-term reaction may be related to insulin resistance, that is, coffee may reduce the sensitivity of insulin and make it unable to play a good role in regulating blood sugar. However, this discovery about the short-term effect (1-3 hours) needs more research support, and from previous studies, drinking coffee for a long time (2- 16 weeks) can improve the blood glucose metabolism and insulin response of healthy people without diabetes, thus reducing the risk of developing type 2 diabetes.
In addition to gastrointestinal and blood sugar control problems, other statements about drinking coffee on an empty stomach also affect digestion and absorption, leading to anxiety and irritability. Similarly, scientific research cannot clearly support these claims. However, don't worry about drinking coffee after breakfast or matching it with other foods!