How sure are you that you are on nutritionally sound ground—in your own eating behavior and in your conversations with family, friends, and colleagues? Put another way, how do you know that what you believe about food is right? Is there any risk that what you and I believe is wrong? Actually, there is always a risk that the current science on any given nutrition subject is wrong or is in error and that subsequent research will correct the error and move on. Science is evolving, not static. But how do you communicate that?