Soda has a pH of 7 or higher, normally between 7 and 8.5, with sodas with special features between 7.8 and 9. Soda is an aqueous solution of sodium bicarbonate, which is weakly alkaline. Soda can be formed naturally or made by machines or with weakly alkaline effervescent tablets. In addition to sodium bicarbonate, natural soda contains a variety of trace element ingredients, so it is also commonly used to make multi-flavored beverages with a mixture of sweeteners and flavors. In addition, the most important nutrient in soda water is sodium, which is beneficial for the human body to participate in water metabolism, and can help regulate the water and osmotic pressure in the body, and maintain the acid-base balance in the body. It is recommended to drink in moderation in daily life.