 Your potential. Alan in St. Louis, Missouri says, I work on my feet all day and I've noticed that my knees are beginning to hurt. What could this be? Well, the weight bearing, depending on how much you weigh, because you didn't list that in the email, but it depends on how much you weigh. It could just be the weight bearing. It could be that you have inflammation, and inflammation is a big deal. It starts in the gut, goes to other areas, okay?