Proper drinking is beneficial. Lemonade is rich in vitamin C, which has a variety of effects, such as anti-bacterial, improving immunity, and assisting in the production of bone collagen. Regular drinking of lemonade can supplement vitamin C, drink 500 to 1000 milliliters of lemonade a day when you have a cold, and can alleviate runny nose, stuffy nose, cough, chest pain and other symptoms. A cold also recovers quickly, especially when it's just a cold. In addition to anti bacteria and improving immunity, lemonade has the effects of appetizing, digestion, fluid production, thirst quenching and sunstroke relieving. What is more rare is that lemon can also expectorant, and the expectorant effect is stronger than oranges and oranges. Add boiling water and salt to the lemon juice and drink it to cough up the thick sputum accumulated in the throat. At the beginning of a cold, you may as well use lemon and honey to flush water to relieve sore throat and reduce throat discomfort. It is worth noting that the amount of lemonade and lemonade should not exceed 1000 milliliters per day.