Ethoxydiglycol is a solubilizer that can also be found in hair products, makeup and bath products. It ensures even distribution of the ingredients throughout a product, to help it work better. No matter how much you shake or blend a formula that combines oil and water, over time the oils will separate from the rest of the liquid - just like salad dressing. A solubilizer like Ethoxydiglycol helps keep a formula well mixed. Ethoxydiglycol is one of many glycol ethers, which are solvents used for various purposes including as solubilizers. While some groups have said glycol ethers could cause health effects, studies indicate this would only potentially occur when a person is exposed at very high levels over time. At the concentrations at which we use glycol ethers in our products, they have low toxicity and break down quickly after use. So, we feel that based on the scientific data, they can be used without harm.