Guest guest Posted October 2, 2008 Report Share Posted October 2, 2008 Polyethylene glycol and polypropylene glycol are related synthetics. They are relatively safe in themselves, but may be contaminated with potentially carcinogenic 1,4-dioxane. http://www.thenakedtruthproject.org/product.details.php?product_id=84 Quote Link to comment Share on other sites More sharing options...
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