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Someone on a product forum reported trying maltitol — a common sugar-free sweetener found in candies — to counteract severe constipation they were getting from the diabetes/weight-loss drug Mounjaro (tirzepatide). They said maltitol reliably gives them diarrhea if they eat it regularly, and after struggling with constipation despite taking psyllium fiber they tried sugar-free gummy candies containing maltitol to get things moving. This is an anecdote about one person using a sugar substitute as an informal remedy, not a clinical trial or medical advice. Maltitol is a sugar alcohol (a type of sweetener) that tastes sweet but is processed differently by the body than table sugar. It’s often used in “sugar-free” or “reduced-sugar” foods like candies and baked goods. Many people don’t fully digest maltitol in the small intestine, so it travels to the colon where bacteria ferment it. That fermentation can draw water into the gut and produce gas, which for some people leads to bloating, cramping, and diarrhea — especially if they eat several treats in a sitting. The snippet is a personal report, not a study. It simply notes a long-standing, well-known pattern: maltitol can cause loose stools for people who are sensitive, and someone used that effect intentionally to relieve drug-related constipation. There’s plenty of broader evidence that sugar alcohols like maltitol can have laxative effects, but how strongly someone reacts varies a lot from person to person. We don’t have controlled data here about doses, timing, or safety in people taking Mounjaro; this is one person’s experience and a common anecdote among others who’ve tried sugar-free candies. Why this matters is practical: constipation is a common and sometimes severe side effect of GLP-1/GIP receptor agonist drugs (the class that includes tirzepatide/Mounjaro and semaglutide/Ozempic/Wegovy). People try many self-care strategies — fiber, stool softeners, laxatives — and may turn to foods or sweeteners that have known gastrointestinal effects. For someone already affected by constipation, knowing that maltitol can reliably loosen stools for some people might be useful information. It’s an easily accessible option that some will consider when other measures don’t work. There are important caveats and risks. Deliberately eating maltitol to induce diarrhea can cause dehydration, electrolyte imbalance, stomach pain, and uncomfortable gas. It may also worsen quality of life or interfere with medications and conditions where diarrhea is dangerous. If you have diabetes, note that sugar alcohols still add some calories and can affect blood sugar slightly in different ways across products. Most importantly, this is informal and not a recommended medical treatment: talk with a clinician about safe constipation management, especially if you’re taking prescription drugs like Mounjaro. Bottom line: maltitol-containing sugar-free foods can cause diarrhea for many people and some use that effect to relieve drug-related constipation, but it’s an anecdotal fix with real downsides and should be approached cautiously and discussed with a doctor.
Source: r/Mounjaro