chemist bryson rast demonstrates the preparation of charlotte's web oil.irst the plant is soaked in food grade alcohol to draw out the cannabinoids. >> how long do you soak it for? >> the solubility is quite high. so we can soak it for as short as maybe a couple of hours to maybe overnight. >> and you end up with something like this. >> the solution is heated, to maximize alcohol evaporation. that is heated and mixed with olive oil. >> how many quality control processes do you have? >> we use analytical testing on site. to determine the viability of the raw oil. >> none of the stanley brothers have a medical degree. prior to this several works in the oil fields of texas. jesse stanley says they've determined proper dosing through trial and error. >> how do you know you're getting too much, you need to dial it back? >> it's the point of finding what works. it's not going ocause any effect, like drowsiness or something like tha that. it's can strictly, their body will get rid of it. >> when i drink six cups of coffee i know i've had too much caffeine. >> the