PEGs, or polyethylene glycols, are a group of synthetic, water-soluble polymers that are commonly used in personal care products as emulsifiers, thickeners, and moisturizers. PEGs are popular in personal care products because they can help to improve the texture and consistency of creams, lotions, and other products, and can also help to increase the penetration of other ingredients into the skin. However, some people may be sensitive to PEGs and may experience skin irritation or other adverse reactions when using products that contain these ingredients. In recent years, there has been some controversy over the safety of PEGs and other synthetic ingredients in personal care products. Some studies have suggested that certain PEG compounds may be contaminated with carcinogenic substances called 1,4-dioxane, which can be harmful to human health. As a result, some companies have started to reformulate their products to use alternative ingredients, such as natural emulsifiers and thickeners.