Red Bull is a functional drink, mainly containing taurine, caffeine, pantothenic acid, lysine, inositol and other ingredients, and may have adverse effects on the human digestive system, nervous system and cardiovascular system when consumed in excess by people with special constitutions: 1. Digestive system: Taurine, pantothenic acid and other acidic substances in Red Bull will stimulate the stomach to secrete gastric acid and promote the digestive function of the stomach. Drinking large amounts may cause excessive secretion of gastric acid, resulting in damage to the gastric mucosa and stomach wall. For people who have gastritis, gastric ulcer and other digestive system diseases, there may be an increase in stomach discomfort; 2, nervous system: the caffeine in Red Bull can improve the excitability of the nervous system, with anti-fatigue effect. However, drinking large amounts will affect the quality of sleep, which will lead to memory loss, inattention and neurasthenia in some people; 3, cardiovascular system: the caffeine in Red Bull and other substances can also increase blood flow, dilate blood vessels and promote blood circulation. Drinking large amounts of it is likely to cause increased heart rate and increased heart load. For people with hypertension, coronary heart disease and other cardiovascular insufficiencies, it may cause increased blood pressure, panic, palpitations, fatigue and other uncomfortable symptoms; 4, other: in addition, the sugar content in Red Bull is relatively high, and long-term heavy drinking can lead to obesity. For adolescent groups, drinking large amounts may also affect growth and development, while diabetic people drink large amounts, easily causing abnormal increases in blood sugar, which is not conducive to controlling the disease.