It sounds to me as though you have an unhappy descending colon. I take L-glutamine and digestive enzymes (I use 'Total Enzymes' from Nutri-West) for that. I took a LOT of L-glutamine at first and it will produce a lot of 'sounds' in the gut (very embarrassing!) But that's a sign the L-glutamine is working. Eat a lot of leafy greens too. Try also adding wheat/barley grass 'green foods' (I use 'green magma' from GNC) It takes a little while, but your colon will thank you for it. You could also try getting 'flushed' out too (high colonic). There are low-carb fiber supplements too.