Interesting this article talks about alcohol and adolescents..
"The best analogy is with another drug – alcohol. Most people know that a 12-ounce beer is much less potent than 12 ounces of vodka. Cannabis in smoked form is closer to the beer, while a concentrate is more like the vodka. Neither is safe for an adolescent, but one is even more dangerous."
Why not examine the effects of alcohol on adolescents too. Yet they still sell that..