--- title: "Sweet but Sensitive: How Fake Sugars and Polyols Affect Your Gut Health" entity: "blog" canonical_url: "https://www.drdanwool.com/blog/fakesugars" markdown_url: "https://www.drdanwool.com/llms/blog/fakesugars" lastmod: "2025-11-11T19:00:00.000Z" --- Medically reviewed by [Dr. Dan Wool, NMD](https://www.linkedin.com/in/drdanwool/) Arizona-licensed Naturopathic Physician and Gastroenterology Specialist Updated: February 24, 2026 TL;DR Summary: - What Are Sugar Alcohols (Polyols)?: Sugar alcohols are low-calorie carbohydrate sweeteners like xylitol, erythritol, sorbitol, and mannitol used in sugar-free products; they have a low glycemic index but are incompletely absorbed, causing fermentation in the colon. - Sugar Alcohol Side Effects and Digestive Symptoms: Common gastrointestinal effects include bloating, gas, abdominal cramping, diarrhea, and nausea; sorbitol and mannitol are FODMAPs that particularly trigger IBS symptoms, while erythritol is generally better tolerated in moderate amounts. - Who Should Avoid Sugar Alcohols?: People with IBS, SIBO, or functional GI disorders are most at risk; children and older adults may be more sensitive; excessive intake can cause osmotic diarrhea leading to dehydration and electrolyte imbalances. - Sugar Alcohol Health Risks: Cardiovascular Concerns: Recent studies link elevated xylitol levels to increased platelet reactivity and heart attack/stroke risk, while erythritol may enhance blood clot formation; naturopathic practitioners suggest natural alternatives like stevia or monk fruit instead. - Common Myths About Sugar Alcohols Debunked: Not completely natural (industrially manufactured), not calorie-free (2-2.4 cal/gram except erythritol), overconsumption causes health issues beyond digestive distress, and they're not safe for everyone—especially those with IBS or SIBO on low-FODMAP diets. ## What Are Sugar Alcohols ( Polyols )? Sugar alcohols, also known as polyols, are a type of carbohydrate used mainly as low-calorie, artificial sweeteners as an alternative to sugar. These occur naturally in small amounts in fruits and vegetables but are typically manufactured for use in processed foods. Despite their name, sugar alcohols are neither sugars nor alcohols in the traditional sense. Their chemical structure allows them to stimulate the sweet taste receptors on the tongue, providing sweetness with fewer calories than ordinary table sugar [1]. Commonly used sugar alcohols include xylitol, sorbitol, mannitol, erythritol, maltitol, and isomalt. They have become very popular in sugar-free gums, candies, baked goods, and oral care products. What attracts people to them is their low glycemic index and minimal impact on blood sugar levels, which makes them suitable for people with diabetes, insulin resistance, or following a variety of diet plans [1]. Sugar alcohols are incompletely absorbed in the small intestine and, as a result, they pass into the colon where they are fermented by gut bacteria, potentially causing gas, bloating, and diarrhea [1]. ## Symptoms and Digestive Effects of Artificial Sweeteners Although sugar alcohols are widely used as low-calorie sweeteners and are generally recognized as safe (even recommended by nutritionists, healthcare professionals, and fitness gurus), they are well known for causing gastrointestinal (GI) side effects in many individuals. This is due mainly to the fact that they are not absorbed completely in the small intestine. Once they reach the colon, sugar alcohols are fermented by gut bacteria, producing gas and drawing water into the bowel, which can lead to a range of digestive symptoms [1]. ## GI symptoms from artificial sweeteners The most frequently reported GI symptoms from sugar alcohols include: - Bloating - Flatulence - Abdominal cramping - Loose stools or diarrhea - Nausea (especially with large doses) These effects depend on the amount consumed, meaning the more sugar alcohols consumed, the more likely symptoms are to occur. However, even small amounts can cause discomfort in sensitive individuals. ## Polyols are the 'P' in FODMAP Not all sugar alcohols are equal when it comes to side effects. - Sorbitol and mannitol are particularly notorious for causing digestive distress. Both are classified as FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols), which are known to exacerbate symptoms in individuals with irritable bowel syndrome (IBS). These compounds are slowly absorbed and highly fermentable, making them common triggers for bloating and diarrhea. - Erythritol, on the other hand, is often better tolerated. It is mostly absorbed in the small intestine and excreted unchanged in the urine, which means it undergoes minimal fermentation in the colon. However, if you consume it in large quantities, i.e., you have too many servings of sugar-free products, it can still cause nausea, bloating, and mild laxative effects. - Xylitol and maltitol can be classified somewhere in between in terms of the side effects that they cause. They are partially absorbed and can cause moderate GI symptoms, particularly when consumed in excess. ## Who is Most at Risk of GI issues from Artificial Sweeteners? People with [IBS,](/ibs-treatment) [small intestinal bacterial overgrowth (SIBO)](/sibo), or other functional GI disorders are more likely to experience adverse effects from sugar alcohols. In addition, children and older adults may also be more sensitive to the laxative properties of sugar alcohols [2]. In rare cases, excessive intake of sugar alcohols, particularly if you consume them from many sources in one day, can lead to osmotic diarrhea, which may result in dehydration and electrolyte imbalances if not addressed promptly. ## When to be concerned about erythritol, mannitol, sorbitol Occasional digestive discomfort after consuming sugar-free products is common and shouldn’t be a cause of immediate concern. However, if you observe persistent or severe symptoms, these may indicate a sensitivity or intolerance to sugar alcohols. You should be concerned if you experience chronic bloating, frequent loose stools, or symptoms that worsen after consuming sugar-free or low-carb products. As mentioned above, people with [IBS](/ibs-treatment), small intestinal bacterial overgrowth ([SIBO](/sibo)), or other gastrointestinal disorders may be more susceptible to adverse effects, so it’s best to avoid or be very cautious when consuming sugar alcohols to avoid severe symptoms, especially osmotic diarrhea and the linked dehydration and electrolyte imbalance. ## Health Impacts of Artificial Sweeteners: Traditional and Naturopathic Perspectives ### Traditional Medical View of Artificial Sweeteners Sugar alcohols are generally recognized as safe by the FDA and are widely used in sugar-free and low-carb drinks and foods. There’s no denying that they are beneficial for blood sugar control and dental health. However, recent studies have raised concerns about potential cardiovascular risks. A 2024 Cleveland Clinic study found that elevated xylitol levels were associated with increased platelet reactivity, which may raise the risk of heart attacks and strokes [2]. Similarly, erythritol has been linked to enhanced blood clot formation in some individuals [3]. ### Naturopathic and Holistic View of Artificial Sweeteners Sugar alcohols may disrupt gut microbiota and contribute to inflammation, so naturopathic practitioners often recommend elimination diets, probiotic support, and natural sweeteners like stevia or monk fruit. It’s important to eat mindfully and keep a food journal to identify personal triggers, especially in individuals with IBS, SIBO, or autoimmune conditions. These sweeteners are also common in many processed foods that naturopathic practitioners often suggest avoiding in favor of whole foods. ## Common Sugar Alcohol / Artificial Sweetener Myths Despite their popularity in health-conscious and diabetic-friendly products, sugar alcohols are often misunderstood. Several myths and misconceptions persist, which can lead to confusion or unintended health consequences. ### Myth #1: Sugar alcohols are completely natural. While sugar alcohols like xylitol and sorbitol do occur naturally in small amounts in fruits and vegetables, the versions used in commercial food products are industrially manufactured. This involves chemical processes such as hydrogenation of sugars like glucose or sucrose, to create a stable, sweet compound suitable for mass production and with a long shelf life [1]. This distinction is important for consumers who prioritize natural ingredients in their diets. ### Myth #2: Sugar alcohols are calorie-free. Most sugar alcohols contain fewer calories than regular sugar, but they are not calorie-free. For example: - Sorbitol and xylitol provide about 2.4 calories per gram - Maltitol offers around 2.1 calories per gram - Erythritol is the exception, with almost zero calories because it is absorbed in the small intestine and excreted unchanged in urine This means that while sugar alcohols can help reduce overall caloric intake, they still contribute energy and should be consumed in moderation. ### Myth #3: You can consume as much as you want. Like with all other foods and diets, moderation is key here as well. Overconsumption of sugar alcohols can lead to digestive distress, including bloating, gas, and diarrhea. This is especially true for sorbitol, mannitol, and maltitol, which are poorly absorbed and highly fermentable in the colon. In sensitive individuals, even small amounts can trigger symptoms. Recent research has raised concerns about cardiovascular risks associated with elevated blood levels of xylitol and erythritol, which may increase platelet activity and the risk of clot formation [2] [3]. These findings suggest that moderation is not just about comfort, but it may be about long-term health. ### Myth #4: Sugar alcohols are safe for everyone. While sugar alcohols can be beneficial for people with diabetes or those reducing sugar intake, they are not ideal for everyone. Individuals with irritable bowel syndrome (IBS), small intestinal bacterial overgrowth (SIBO), or other digestive disorders may experience significant discomfort from even modest amounts of sugar alcohols. Their classification as FODMAPs means they are known triggers for gastrointestinal symptoms in these populations. ## Frequently Asked Questions about Sugar Alcohols and Gut Health ### 1. Why do sugar-free products make my IBS so much worse? What can I use instead? - The short answer: Sugar-free products contain sugar alcohols (polyols) that are classified as FODMAPs, which are known IBS triggers. These compounds aren't fully absorbed in your small intestine, so they travel to your colon where gut bacteria ferment them, producing gas, bloating, and diarrhea. - What's happening in your body: The sugar alcohols most likely to worsen your IBS symptoms are sorbitol and mannitol. When these reach your colon, they draw water into your bowel (osmotic effect) and undergo fermentation, creating the perfect storm for digestive distress. Even products marketed as "gut-friendly" or "keto-approved" can contain these problematic sweeteners. - Better alternatives to try: - Stevia: A natural, plant-based sweetener that doesn't ferment in the gut and is low-FODMAP in small amounts - Monk fruit: Another natural option that's generally well-tolerated and doesn't cause digestive upset - Small amounts of real sugar: Sometimes a teaspoon of regular sugar causes fewer symptoms than sugar alcohols - Glucose or dextrose: Simple sugars that are absorbed quickly and don't reach the colon to cause fermentation - Practical tip: Start keeping a food and symptom journal. Track what you eat and how you feel 2-6 hours later. This will help you identify your personal triggers and tolerance levels. ### 2. How do I know if sugar alcohols are causing my symptoms when they're hidden in everything I eat? You're right to be frustrated -- sugar alcohols are everywhere, often hiding under different names and in products you'd never suspect. - Common hiding spots in your daily routine: • Morning: Sugar-free coffee creamers, protein powders, breakfast bars • Snacks: Protein bars, sugar-free gum, mints, "keto" snacks • Drinks: Sugar-free energy drinks, flavored waters, pre-workout supplements • Condiments: Sugar-free ketchup, BBQ sauce, salad dressings • Desserts: Sugar-free ice cream, cookies, chocolate, candy • Medications: Cough drops, chewable vitamins, liquid medications - How to identify them on labels? Look for these names: • Sorbitol • Mannitol • Xylitol • Erythritol • Maltitol • Isomalt • Lactitol • Any ingredient ending in "-ol" - Try a 2-week elimination test: • Week 1-2: Eliminate all products containing sugar alcohols. Read every label carefully. • Track your symptoms: Note improvements in bloating, gas, diarrhea, and cramping. • Week 3: Reintroduce one product at a time and observe your reaction over 24-48 hours. • Identify your tolerance: You may find you can handle erythritol but not sorbitol, or that small amounts are fine but multiple servings cause problems. - Pro tip for Scottsdale and Phoenix shoppers: At grocery stores, focus on the perimeter of the store (produce, etc) rather than the center aisles (processed products). The "health food" section is ironically where most sugar alcohols hide. ### 3. Is erythritol in my monk fruit sweetener going to give me a heart attack? Should I just give up on everything processed? Well...let's separate fact from fear. - What the research actually shows: Recent studies from Cleveland Clinic found associations between elevated blood levels of xylitol and erythritol and increased cardiovascular risk. [4][5] However, this doesn't mean your monk fruit sweetener is going to cause a heart attack. Here's the important context: • The studies measured blood levels in people who already had cardiovascular risk factors • The research showed correlation, not direct causation • The cardiovascular concerns are primarily associated with excessive, chronic consumption • Erythritol is actually the best tolerated sugar alcohol for gut health because it's mostly absorbed in the small intestine and doesn't ferment in the colon like sorbitol or mannitol - Should you be concerned? If you have existing cardiovascular risk factors (high blood pressure, family history of heart disease, high cholesterol), it's worth discussing with your doctor. For most people using moderate amounts of sugar alcohol, the risk appears to be low. What "moderate" actually means: • Occasional use in coffee or tea: Generally fine • Multiple servings daily from various sources: May want to reconsider • Using it as your only sweetener in large quantities: Worth reducing You don't have to give up on everything -- here's your action plan: - Immediate steps: • Assess: Add up all sources of erythritol you consume daily (sweetener packets, protein bars, drinks, desserts) • Prioritize: If erythritol helps your gut health and you use it moderately, the digestive benefits may outweigh potential cardiovascular concerns • Diversify: Rotate between erythritol, stevia, monk fruit (without erythritol), and small amounts of real sugar - Longer-term strategy: • Retrain your palate: Gradually reduce overall sweetness in your diet so you need less of any sweetener. • Focus on whole foods: The more you eat whole, unprocessed foods, the less you need to worry about sweetener labels. • Work with a professional: Consider consulting a registered dietitian familiar with IBS and FODMAPs who can help you create a personalized plan. The hopeful truth: You're not destined to choose between gut symptoms and heart health. Many patients find that: - Small amounts of erythritol work well for them without issues - Stevia and monk fruit (pure, without erythritol added) are excellent alternatives - Reducing overall sweetener dependence improves both gut and metabolic health - Symptom management gets easier once you identif your individualized and specific triggers Remember: Your anxiety about food can add to stress, which also affects gut health. Finding a sustainable, personalized approach is more important than perfection. Consider working with a healthcare provider who understands both the gut-brain connection and functional GI disorders. ## The Bottom Line on Sugar Alcohols & Gut Health Sugar alcohols offer a sweet alternative for those reducing sugar intake or managing blood glucose. However, they can cause digestive issues and may pose cardiovascular risks when consumed in excess. Moderation and personalization are key. If you suspect sugar alcohols are affecting your gut health, you should consider tracking your intake, consulting a healthcare provider, and exploring natural alternatives that better suit your body. About the Author ## Dr. Dan Wool, NMD Dr. Dan Wool is a naturopathic doctor who specializes in gastroenterology, hormones and men's health in Scottsdale, Arizona. [Set up a free 15-minute discovery call with Dr. Wool today! ](https://drdanwool.com/booking) [Read more about Dr. Wool's Gut Health Journey](/about) ## References: [1] [Mayo Clinic. (n.d.). Microscopic colitis - Symptoms and causes. Retrieved June 26, 2025, from https://www.mayoclinic.org/diseases-conditions/microscopic-colitis/symptoms-causes/syc-20351478](https://www.hopkinsmedicine.org/health/conditions-and-diseases/collagenous-and-lymphocytic-colitis) [2] [National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). (n.d.). Symptoms & Causes of Microscopic Colitis. Retrieved June 26, 2025, from https://www.niddk.nih.gov/health-information/digestive-diseases/microscopic-colitis/symptoms-causes](https://www.niddk.nih.gov/health-information/digestive-diseases/microscopic-colitis/symptoms-causes) [3] [Johns Hopkins Medicine. (n.d.). Collagenous and Lymphocytic Colitis. Retrieved June 26, 2025, from https://www.hopkinsmedicine.org/health/conditions-and-diseases/collagenous-and-lymphocytic-colitis](https://www.hopkinsmedicine.org/health/conditions-and-diseases/collagenous-and-lymphocytic-colitis) [4] Cleveland Clinic Xylitol study: accessed 11/5/25 from [https://newsroom.clevelandclinic.org/2024/06/06/cleveland-clinic-led-study-links-sugar-substitute-to-increased-risk-of-heart-attack-and-stroke ](https://newsroom.clevelandclinic.org/2024/06/06/cleveland-clinic-led-study-links-sugar-substitute-to-increased-risk-of-heart-attack-and-stroke) [5] Cleveland Clinic Erythritol study: accessed 11/5/25 from: [https://newsroom.clevelandclinic.org/2024/08/08/cleveland-clinic-study-adds-to-increasing-evidence-that-sugar-substitute-erythritol-raises-cardiovascular-risk](https://newsroom.clevelandclinic.org/2024/08/08/cleveland-clinic-study-adds-to-increasing-evidence-that-sugar-substitute-erythritol-raises-cardiovascular-risk)