The truth is parts of us are dying all the time. You probably just lost half a million or so cells just reading this sentence. We all lose about 100,000 cells per second. Fortunately, just as many cells are being reproduced in a healthy body. Healthy bodies have this constant cycle of dying cells and rebirth of new ones. Some scientists say that we are regenerated every seven years, which is an enormous relief to me. Apparently, cells that don't die off in the norma…