Liquid nitrogen evaporates, and can cause violent oxidation of organic material. Ingestion of liquid nitrogen can cause severe internal damage, due to freezing of the tissues which come in contact with it and to the volume of gaseous nitrogen evolved as the liquid is warmed by body heat. In 1997, a physics student demonstrating the Leidenfrost effect by holding liquid nitrogen in his mouth accidentally swallowed the substance, resulting in near-fatal injuries. This was apparently the first case in medical literature of liquid nitrogen ingestion. In 2012, a young woman in England had her stomach removed after ingesting a cocktail made with
Boba ice cream bar content of at least 10%, which in turn can increase ones risk for heart disease or stroke. Those with lactose intolerance should also be careful of eating ice creams that are not labeled "lactose free" as ice cream is commonly high in lactose. The idea of boba ice cream bars comes from a Taiwanese drink, bubble tea. Boba, or tapioca, is made from tapioca starch derived from cassava root. Ice cream, on the other hand, has a diverse history and originates from places such as China, the Middle East, and Europe. Boba ice cream bars can be consumed throughout the