P Sure synthetic just saved me my 60k a year job! The testing company was MEDTOX. I've heard testing companies are catching on and finding ways to tell if the sample is synthetic. But, it's been a week now, and I haven't heard any bad news. Thank you P SURE! If you choose to go with synthetic, just make sure you check the temp on the bottle a few minutes before you go in to take the test. Good luck fellow tokers!!!