For people with sensitive gastrointestinal tract, coffee can be chosen to drink after breakfast, and others can choose their own coffee drinking time according to their own preferences and characteristics. Coffee drinking time is not strictly regulated, many people are used to drinking a cup of coffee for breakfast, or drinking coffee on an empty stomach, and then drinking it with other foods such as bread, which generally does not cause serious adverse reactions. But for some digestive function is relatively weak, such as gastroesophageal reflux, gastritis, gastric ulcer patients drinking coffee on an empty stomach, especially when drinking strong coffee on an empty stomach, easy to nausea, vomiting, abdominal pain, abdominal distension and other adverse reactions, leading to acid reflux and other symptoms aggravated. This group of people is recommended to drink coffee after eating breakfast, and to control the concentration of coffee, try not to drink strong coffee. Coffee contains certain nutrients, which contains more caffeine and some other antioxidant substances. Moderate consumption of caffeine can refresh the mind, but excessive consumption can lead to gastrointestinal discomfort, panic, insomnia and other symptoms in some people. Therefore, you should regulate the amount of coffee you drink and choose the time to drink coffee according to your own situation.