MILLIONS OF AMERICANS SUSPECT THEY’RE SUFFERING FROM A GASTROINTESTINAL DISORDER BUT OFTEN SPEND YEARS IN PAIN BEFORE THEY FIGURE OUT JUST WHAT’S GOING ON WITH THEIR GUT AND JOINING US TO DISCUSS A LITTLE-KNOWN (BUT VERY COMMON) DISORDER IS SHIVAN SARNA, AUTHOR OF “HEALING SIBO: THE 21-DAY PLAN TO BANISH BLOAT, FIX YOUR GUT AND BALANCE YOUR WEIGHT.”.