It depends on your daily dose of CBD, your body mass index and weight, as well as how long you have been taking CBD. Unfortunately, the miniscule amount of THC in our CBD oil, although BELOW the Federal legal limit <0.3%), will build up and stay in your system for weeks. You will NOT get high on this amount at all, but you MAY still test positive. This is a major flaw in our legal system, one that should finally be changed in the near future as marijuana legalization is growing by states and countries. Contact your politicians and tell them you support marijuana legalization!