I do not have experience eating Indian food but I definitely cannot have spicy food. I will say this, both surgeries have risks but I think if you can live with an ostomy and be compltely happy with it, I would say keep it. If you are one of those people that has to try a J-pouch and does not want to wonder, "what if", then I say try the J-pouch.
I had a 2 step surgery and I am at 6 years now. I have had no major complications with my pouch, I get constipated if I overeat 2 days in a row but I am monitoring that now. I never had pouchitis either. I go 14-20x a day and I am happy, no regrets
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