Generally speaking, there is no such thing as “4 taboos of drinking lemonade”. However, due to the high acid content in lemons, people with bad stomachs and dental problems should drink less lemonade. 1. People with bad stomach and intestines drink less lemon water: lemon water within the large number of acidic substances will stimulate the gastrointestinal tract, so that the secretion of gastric acid increases, and excessive gastric acid will stimulate the human digestive tract, aggravate gastroesophageal reflux, peptic ulcers and other symptoms of the disease. Therefore, people with high gastric acid secretion, gastritis and gastric ulcers are advised to drink less or no lemon water. 2. People with dental problems drink less lemonade: lemonade contains not only acidic substances, but also contains a certain amount of sugar, acidic substances and sugar intake will destroy the teeth, and even tooth decay. Therefore, for people with dental problems such as pulpitis and tooth decay, try to drink less lemon water. Normal people drink lemon water appropriately, have to promote intestinal peristalsis, replenish the body’s vitamin needs, accelerate the metabolism and other benefits, but you can not drink too much, so as not to jeopardize your health.