This is a difficuilt question to answer conclusively, only because there is so little research and even less of it is conclusive. That being said, we do extensive amounts of research to present the safest, most effective products on the market. We do not rely solely on any one source of information. So while we check the Skin Deep database, we recognize that this is only one source - and not an infallible one - of information. We also speak with the manufacturers and search through other research databases for information on the most current research on the various natural and synthetic chemicals used in beauty and personal care products.