Mannitol is a type of sugar alcohol that is commonly used as a sweetener in food products and as a medication. It is found naturally in some fruits and vegetables, but it can also be produced synthetically. Mannitol is often used in the medical field to help reduce pressure in the eyes and to treat kidney failure by promoting urine production. In addition to its medical uses, mannitol is also utilized in laboratory settings as a cryoprotectant, helping to preserve cells and tissues during freezing. It is generally considered safe for consumption, but excessive intake can lead to gastrointestinal discomfort.