Can one be intolerant to Ensure and experience diarrhea when taking it?

Yes, it is possible to be intolerant to certain ingredients in Ensure and experience diarrhea when consuming it. Some people may have difficulty digesting lactose, which is found in milk-based products like Ensure. If you suspect that lactose may be causing your symptoms, it could be helpful to monitor your diet and see if removing lactose-containing foods improves your symptoms. Additionally, if you experience frequent diarrhea, it is possible that your intestinal lining is damaged, making it harder for your body to metabolize certain substances like lactose, which could exacerbate your symptoms.