It is naturally occurring in food. So what's the acceptable safe dosage? Wait, you didn't even know it was in your food in the first place. How were you to determine what was safe to eat? You've gone and provided support for my very-roundabout point: you and I are not informed consumers. The world is too effin complicated for us to make a rational decision on everything we're going to come across in our lives. And for-profit companies don't have a particularly compelling reason to make sure you're doing that.