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Nitrogen does not need to be artificially synthesized, and is completely extracted from natural air. The reason why there are industrial, food, and medical grade standards just shows that it can be used reasonably. Liquid nitrogen is added when the package is closed, and it will immediately vaporize into gas before it touches the water and stay between the water and the bottle cap. When the consumer opens the package, the nitrogen will immediately enter the air from the bottle, which affects the water quality itself. No effect. Moreover, there are only relative products. Because the liquid nitrogen process is used to encapsulate food, additional equipment and raw materials need to be purchased, which increases production costs. If it is not in the pursuit of product quality, why not mix it directly into air packaging?

78% of the air is nitrogen, and we inhale nitrogen all the time. Nitrogen itself is hardly soluble in water, does not react with water and is not absorbed by the human body, so the safety of nitrogen is beyond doubt. In the above, as a food processing aid, nitrogen is widely used in food production and packaging technology. The "Standard for the Use of Food Additives (GB 2760-2014)" lists it in Table C.1 in Appendix C. It is a processing aid that can be used in [various types of] food processing and [the residual amount does not need to be limited]. In other words, the national standard clearly stipulates that nitrogen can be added to food during production and processing, and there is no limit to its residual amount. Therefore, it is legal and compliant to fill the beverage with nitrogen. Therefore, nitrogen is a very common processing aid in the food industry. It is often used to delay the oxidation rate of food and prolong the shelf life of food. At the same time, it has the effect of enhancing the hardness of the packaging, which is convenient for transportation and carrying. It is a common use in the food industry. Practice and craftsmanship.

The journal "Food and Machinery" of the Chinese Society for Food Science and Technology also published a paper proving that nitrogen filling technology will not affect the quality of drinking water. The effect of nitrogen filling technology on the quality of natural mineral water.