I think having "good for them" foods in the house and making sure they are physically active would be the most proactive thing we as parents can do....unfortunately, i raised carb addictive kids....my two oldest have caught on and are really watching their choices and look/feel fine...the other two (who btw were so successful on Atkins) ended up resenting the whole thing and have gone bonkers...they seem to still be on a big carb binge...(not here but outside this environment) I've bought them just about every book on teen obesity and have tried to teach them good nutrition...all in all...it is "they" that control what they put in their mouths...I just wish I would've started when they were very young...