I had gastritis attacks from age 18 until about 3 years ago (and the last 3 years have been the most stressful of my life by a mile thanks to H). Until KML made the B12 connection, I never got that it was related to my B12 problem. I lack something called intrinsic factor, which I discovered during that bad bout with my guts when they thought I had Crohn's. I've always been iron-deficient, but didn't know I was B12 deficient until then. Normally this is a problem for older people. As soon as I started getting B12 shots (people with my issue don't do as well with oral meds) the gastritis went away and never came back.
I did have my gallbladder removed about 15-20 years ago. The only problem I've ever had is the typical paying for eating greasy meals.
My guts are much better now.
KML inspired me to make an appointment today to resume my B12 shots (I've been slacking off in all this drama).