I have had a lot of stomach problems over the last month or so. I have been a big fan of Algin and have been taking it regularly for over a year or so and because it is not digestable was reluctant to suspect it. However the day after stopping the Algin my stomach problems cleared up. I wonder whether long term use can have detrimental effects. I would be intersted to hear from anyone that has had problems with longer term use of Algin