Uses
Polyethylene glycol is used in many products as a thickener. It is used in toothpaste because it can prevent bacteria from breaking down the substances that control tartar buildup. PEG is also used to make detergents that have foaming, thickening stabilizing properties. PEG ensures proper mixing of the ingredients, making cleaning products such as shampoos more effective. PEG is used in many medications as well; for example, PEG 3350 comes in powder form which has to be mixed with water, and is used to treat occasional constipation. This is a prescribed medication and, according to MedlinePlus, should be taken exactly as directed. Speak with your doctor or pharmacist if you are unsure about how to take PEG.