>> i did meth. and now this is my life. >> reporter: these harrowing meth ads helped drop teenage meth use in montana by 50%. sam prestige is a georgia teenager. >> i knew i was overweight. >> i could see how unhappy he was at school. >> i started being teased a lot. >> reporter: he said he is trying to eat better, change his life and avoid becoming a statistic in a commercial. steve osunsami, abc news. >> very important issue and polarizing one as you can see for clear reasons there. a lot of folks chiming in on facebook on this one. >> a lot of fans, viewers. >> they're not really fans. >> no, they don't like us. one says, that's part of what is wrong in the first place, parents working all of the time. deborah murray says yikes our children don't feed themselves. i would hate for children to get that in their head at such a young age. as parents we must give our children the tools to thrive. >> you know what, kids do kind of feed themselves if the parents aren't around. the onus on us to have healthy choices in the cupboards and in the cabinets. my kids can't reach anything. >> put them way high. if you look at the stats. first, second graders, high blood pressure.