text:  Hello and welcome to the show. I'm your host, Pat Campbell. We've got a fascinating program for you today. Our guest today says that there is a youth molecule in the human body, and he says this molecule of youth happens to be concentrated in our skin, hair, eyes, and joints. He says this substance not only dramatically influences our appearance, in other words, how young or how healthy we look, but more importantly, our physical strength, our flexibility, and mobility.