Thanks gigi. I am 82 and have had IBS-D for over forty years. I also have a rare condition called CVID. Common variable immunodepression. Also called "Boy in the Bubble Disease" I don't make normal antibodies to viruses and bacteria. I do infusions of IgG blood plasma every week to get other peoples antibodies. IgG is one part of gammaglobulin. I am also low on IgA which has to do with the GI system. For some of us with this disease we have trouble with our GI, and some of us with lungs or sinuses or autoimmune diseases to go alone with it. I have been GF for 13 years and mostly dairy free. I had a SIBO breath test about six years ago and it came up I was making methane gas which usually goes with constipation, not diarrhea so that doesn't seem to apply to me. I also have gastritis, hiatal hernia, and diverticulosis. I even have an app in my car called We Can't Wait, and believe me I've had to use it. I will take some of your suggestions.