Glyceryl monostearate (GMS) is a fatty acid derived from glycerol that is used in the food and cosmetics industries. It is an emulsifier, meaning that it helps to stabilize mixtures of oil and water, and is used in a variety of products such as margarine, ice cream, and baked goods. GMS is also a surfactant, meaning that it reduces the surface tension between two liquids, making them easier to mix. Additionally, it can also act as a thickening agent, helping to give products a creamy texture.