No, it’s not just that most American airlines have all the charm of colonic irrigation by screwdriver. It’s that there are “physiological, psychological, emotional and social costs” for both individuals and societies. Most business travelers are familiar with jet lag. This study, though, focuses on items such as how (negatively) jet lag influences genes that affect aging. There’s also some evidence that it can turn off genes that influence the immune system, hence leaving your body more open to dropping dead. Some studies say that business travel is isolating. Any relationships made are short-lived. It affects not only those who travel, but also those who are left behind. The researchers point to one study at the World Bank which showed a 300 percent increase in psychological medical insurance claims by travelers, as compared with non-travelers. Get the full story at Inc.com and the University of Surrey in England