Aaron Carroll argues that that sugar shouldn't be treated like alcohol:
Any regular reader on the blog knows of my interest in obesity, and my concern that we are failing to address the problem adequately. But this seems to go a bit too far. There are legitimate reasons that we don’t allow children to purchase and/or consume alcohol. Sugar (as glucose), on the other hand, is necessary for life. It’s in lots of food, not just processed foods. And just because something “can” be abused doesn’t mean we shouldn’t be allowed to have it.