Polyethylene glycols (PEGs) are a group of synthetic compounds made from repeating units of ethylene oxide. They are commonly used in various industries, including pharmaceuticals, cosmetics, and food, due to their ability to dissolve in water and their non-toxic nature. PEGs can vary in molecular weight, which affects their physical properties and applications. In medicine, PEGs are often used as laxatives or as excipients in drug formulations to improve solubility and stability. They also serve as humectants in skincare products, helping to retain moisture. Overall, PEGs are versatile compounds with a wide range of uses across different fields.