According to the British "Daily Mail" reported on August 31, the US Food and Drug Administration (FDA) warned on the 30th that the addition of liquid nitrogen ice cream, cereals, cocktails and candy in the youth group is particularly popular. "It may cause damage to the skin and internal organs, which is caused by the liquid nitrogen used in it." Liquid nitrogen remaining in food and drink can cause serious and even life-threatening injuries, including damage to the skin and internal organs.
Similarly, extreme cold may have a similar effect on the internal tissues of the human body, so the consumption of smoky liquid nitrogen balls can damage the esophagus and lungs. A man who uploaded his video of two "liquid nitrogen puffs" showed that his mouth had been frostbitten. A mother in Florida warned other parents to keep their children away from this food after their son had asthma due to eating liquid nitrogen snacks.
According to the National Food Safety Standards for Food Additives (GB2760-2014), in the regulations on the use of food processing aids such as nitrogen, nitrogen can be used in various food processing processes, and the residual amount is not limited (with GB2760-2014) Table C.1 screenshot).
Because of the colorless, odorless, non-toxic chemical nature of nitrogen, there is no reaction in the body, so there is no limit on intake. As a processing aid, nitrogen does not have food quality and safety problems when it is used. However, in the liquid form, since the liquid nitrogen temperature is extremely low, the human skin directly contacts for more than 2 seconds, it is frostbitten and irreversible, so the edible liquid is consumed. Nitrogen foods should pay attention to the method of consumption to avoid irreversible frostbite.
However, since nitrogen is usually present in the atmosphere in gaseous form, to make it a liquid, the temperature generally needs to be as low as minus 195.5 degrees Celsius, while the lowest temperature recorded in Antarctica is minus 90 degrees Celsius. The FDA warned that although nitrogen is not toxic and can be used to preserve food, very low temperatures can cause frostbite on the skin and damage the throat and stomach.http://www.wxytgas.com/