Diarrhea- chronic after bypass surgery in 1980

Possibly an idea for others suffering from chronic diarrhea and resultant weight loss after Gastric bypass surgery (in 1980 for a bleeding ulcer). I was OK after my recovery period until my early to mid 60s. Never got any relief from several Gastro Drs, dieticians, etc but finally read here about someone suggesting Apple Cider Vinegar (only the unpasteurized and NON filtered type) and it APPEARS to be helping- along with Imodium AD. More details upon request. George