There's a lot of argument over how teenage marijuana use might affect people through life, but distressingly little data to help figure it out. That leaves parents, policymakers and young people pretty much in the dark when it comes to making decisions about use and legalization.
Three long-running studies of teenagers and young adults in Australia and New Zealand might help. An analysis of the studies found a dose-response relationship: The more someone smoked pot as a teenager, the more likely that person would struggle as a young adult.
[For more of this story, written by Nancy Shute, go to http://www.npr.org/blogs/healt...lems-in-young-adults]
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