Bulletin Today | Personal HealthAs we head into a holiday season full of heavy, rich meals, here’s unwelcome news: Not only is heartburn increasing, but also those highly popular acid-blocking drugs don’t seem to work for a large number of us. A recent study in the journal Gut found that during the past two decades there was a 47 percent increase in the number of people who suffered weekly bouts of heartburn, or gastroesophageal reflux disease (GERD), the condition that most often causes that burning …