EO may not kill you today, but who knows what the long term effects are. Again stick with the basic chemicals used in the pharmaceutical industry. They have the $$$ to do the research on different materials used in certain formulations. And if they felt EO was a safe material to use, they would be all over it. Too many UGL are getting too creative for their own good and possibly harming people down the road. I know a few labs that make their Tren with Heet, yes the stuff you use in your gas tank. So be safe out there, you really never know what is in the bottle you buy.