Lemonade is rich in nutritional value and contains carbohydrates, vitamin C, calcium, potassium and other nutrients. Lemon water has high nutritional value and can provide energy to the body. Here is an example of pure lemonade (undiluted). In every 100g of lemon water, it can provide 169KJ of energy to the body. It also provides 6.2g of carbohydrates, 1.2g of fat, 1.1g of protein, etc. Secondly, lemon water is also rich in vitamins and minerals, per 100 grams of lemon water contains 22.0mg of vitamin C, 101mg of calcium, 209mg of potassium. Gastritis, gastric ulcer can not drink a lot of lemon water on an empty stomach, it will cause too much stomach acid, causing stomach pain. Children and the elderly, can not drink a lot on an empty stomach. Pay attention to drinking lemonade in moderation, supplemental nutrition can not only rely on drinking lemonade, but also pay attention to a balanced diet.