The elderly proportionally will lose muscle mass and replace it potentially with fat. They have more less water should I say. Yeah that's right below 50 percent. So from this water. Where do we go? Where is it? Well first I think we should talk about how we get this water in and out of the body. And so those two what kind of relationship do they have? It's beautiful. You know one's positive the other's negative. We don't have to explain who's who you.