Common uses for Liquid Nitrogen Liquid nitrogen can be used for the process of freezing frozen foods.                                             food_pic Liquid nitrogen can be used for cryotherapy where skin lesions, warts, and other things can be frozen to remove and destroy them.                                 cryo_pic Liquid nitrogen is also used for creating high temperature superconductors (this is important because liquid nitrogen is relatively inexpensive to create vs. the production of liquid helium).                             S_con_pic