Now if you are talking about eating things that liquid nitrogen was used to make that is a different story. Lots of people have used liquid nitrogen to make ice cream and they probably use it for other things as well that I am not familiar with. read more
Science writer and fellow at the Royal Society of Chemistry John Emsley says if more than a “trivial” amount of liquid nitrogen is swallowed, the result can be horrendous. “If you drank more than a few drops of liquid nitrogen, certainly a teaspoon, it would freeze, and become solid and brittle like glass. read more
While pin-point-sized droplets of liquid nitrogen on your skin won't pose much of a hazard, the extensive contact you would get from drinking the liquid would cause severe damage to your mouth, esophagus, and stomach. read more