I am 57 years old. I’ve had intermittent bouts of diarrhea and sharp cramps in my stomach for the last 3 weeks. Normally it happens in the middle of the night, and after eating a higher-fat meal. What might cause this?

I normally have a bowel movement about two times a week. But sometimes, the time between is even longer. When I do go, it seems like a lot. Or I’ll go a few times in one day. I eat a lot of fiber and exercise 5 times a week. Could I just have a large colon that takes a while to fill up?

I take 8000 Internation Units (IUs) of vitamin D and drink milk daily. Why would I still have low vitamin D levels?

I've had chronic diarrhea for 3 months. My colonoscopy and stool both tested normal. My endocrinologist re-tested my thyroid and adjusted my medicine. I've kept a food journal, but I still get diarrhea no matter what I eat. Do you have any suggestions?

I recently had my gall bladder removed. Is there a special diet I should follow?

My 15-year-old daughter was recently diagnosed with ulcerative colitis (left-sided). She was prescribed Asacol® to treat the inflammation. She has tolerated the dosage (three times a day) so far. Will she need to be on this drug all the time or only when she has a flare up? Are there any new advances in treating this disease?

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