heather jackson's son zaki is one of them. >> zaki had these, he has a rare form of epilepsy known asse syndrome. by the time he was 5 years old he had had 500,000 seizures. don't usually start crying this early, actually. it's an emotional day because he's 16 months seizure free today, so i'm happy. it's a happy emotion. >> today zaki is talking walking, and being home schooled. his mom, heather jackson, is convinced it's due to an extract found in this controversial plant. >> this is where a lot of the plants are grown. there are approximately 3200 plants in this greenhouse. of those about 80% are charlotte's web. joel stanley runs one of the largest marijuana grows in the state of colorado. it's a family owned operation. the five family brothers went into business in 2008 under the medical marijuana laws passed in the rocky mountains state. jesse stanley supervises the marijuana lab. >> lot of failures lots of successes but we started growing to help cancer patients. from cancer it turned into multiple sclerosis, it turned into diabetes. >> soon a lest known plant compound caught t