Commentary Possibly you didn’t know Jimmy Stewart wore a toupee. Or left Hollywood to serve in World War II, not in a safe PR job but piloting B-24 Liberators over Germany, rose to colonel from private in just four years, and won the Distinguished Flying Cross. Or, if you are the voice of youth, who Jimmy Stewart was. Let alone that he thought ours was a wonderful life. I bring it up in hopes that you will soon watch his Christmas classic along with the 1951 “Scrooge.” But also because a major feature in the Nov. 29 National Post asks “Are we witnessing a new dawn for hair-loss treatments? Amid increasing evidence that baldness can have a severe impact on the mental health of both men and women, scientists are pushing forward with a raft of new hair-loss techniques.” I don’t want to come across as follicle-privileged here. So I …