Smarr says he would love to participate in the ISB study in the hope of getting his digestive system back on track; Hood says that there are a few spots left and that he is welcome. “I’m 65, so it’s questionable whether I’ll be around for another 25 years” to see the end of the long-term study, says Smarr. “On the other hand, watching me go bad could be a good thing to have in the database.”