Sodium citrate can reduce the amount of citric acid added. Sodium citrate can soften the sharp sourness of citric acid. In the production of kefir drinks, it is usually used together with citric acid to improve the taste of the drink. Sodium citrate, also known as sodium citrate, is an organic compound with the appearance of white or colorless crystals. Like citric acid, it is easily soluble in water. Compared with citric acid, sodium citrate is used in the production of kefir drinks. The roles it plays appear to be more diverse.