Polyethylene glycol (PEG) is a synthetic polymer that is commonly used in a wide range of industrial and consumer products, including pharmaceuticals, cosmetics, and food products. In protein powders, PEG may be used as an emulsifier or thickening agent to improve the texture and consistency of the product.
PEG is generally considered safe for use in food and pharmaceutical products when used in accordance with regulatory guidelines. However, there is some concern about the potential health effects of long-term exposure to PEG, particularly in high doses. PEG has been shown to have laxative properties, and high doses may cause diarrhea, nausea, and vomiting. Additionally, some studies have suggested that long-term exposure to PEG may increase the risk of certain types of cancer.
Due to these concerns, some individuals may choose to avoid products that contain PEG, particularly if they have a history of gastrointestinal issues or are at increased risk of cancer.