Cryoprotectant is a term used to describe substances that are added to cells and tissues to protect them during cryogenic storage. Synonyms for this term include cryopreservation agent, cryoprotective molecule, and cryogenic protectant. Other possible synonyms could include anti-freeze agent, cryogenic stabilizer, and ice inhibitor. Regardless of the terminology used, the purpose of these substances is to minimize cell damage and preserve the integrity of biological samples during long-term storage at extremely low temperatures. Cryoprotective compounds may range from simple sugars and glycerol to sophisticated synthetic molecules that are specifically designed for cryopreservation applications.