I have severe IBS with numerous loose bowel movements every day. This has been going on for about 18 years. I just figured out that it coincides with my diet soft drink addiction.
I never touched the stuff until I joined Weight Watchers, back then they really advocated using sugar substitutes. I'm trying to kick the habit right now. This is first cold turkey day and I'm so nauseated. I don’t understand how a soft drink could make me feel like this

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I really, really hope that quitting the aspartame habit will make me better. I even wake up a couple of times during the night to go. It sure doesn't help with the fatigue.
I never told my doctor about my nearly 2 liter a day habit. He thinks it could be MS related or just plain old IBS.