Marathon training means long runs and long runs mean fueling on the run. Through trial and error I've found that I can handle orange Gatorade, chocolate Clif Shot gels and, sometimes, Starburst jelly beans. I have a pretty tough time chewing on the run so I usually keep the jelly beans for pre-run, post-run, or breaks. But, you know, I'm into the whole real food thing these days so Gatorade? Jelly beans? Not so real. And probably not what I should be consuming. Well, lucky, lucky me! I was invited to try out PureFit bars recently and I was happy to do so because PureFit bars are…