Polyethylene Glycol (PEG) is a synthetic polymer made from repeating units of ethylene glycol. It is commonly used in various industries, including pharmaceuticals, cosmetics, and food. PEG is known for its ability to dissolve in water and its versatility, making it useful as a lubricant, thickening agent, and solvent. In medicine, PEG is often used in laxatives and as a base for ointments and creams. It is generally considered safe for use, but some individuals may experience allergic reactions. PEG is also utilized in the production of biopharmaceuticals to improve drug delivery and stability.