Maltodextrin is a bland white powder made from starch, and it shows up in everything from snack seasonings and instant soups to sweetener packets. On paper it counts as a complex carbohydrate, but your body treats it much more like plain sugar. Not all maltodextrin is alike, though: one version is built to resist digestion and acts more like dietary fiber.
What Maltodextrin Is Made From
Maltodextrin starts as ordinary starch, the long chains of glucose units found in corn, potatoes and rice.1Electronic Code of Federal Regulations. 21 CFR 184.1444 — Maltodextrin Enzymes or acids cut those long chains into much shorter pieces.2Organic Materials Review Institute. Maltodextrin The result is a mix of glucose, maltose and short dextrin chains.3IOP Conference Series: Materials Science and Engineering. Classification of dextrose equivalent analysis maltodextrin starch seeds through enzymatic hydrolysis reaction US rules describe it as a non-sweet white powder or a concentrated syrup.4Electronic Code of Federal Regulations. 21 CFR 184.1444 — Maltodextrin
To be called maltodextrin in the US, the starch must be only partly broken down, with a “dextrose equivalent” (DE) under 20.5Electronic Code of Federal Regulations. 21 CFR 184.1444 — Maltodextrin That number is a scale of how broken down the starch is, from 0 for pure starch to 100 for glucose. That keeps maltodextrin short of corn syrup solids and dextrose, which are broken down further. Lower-DE maltodextrin tastes nearly neutral, while higher DE tastes slightly sweet.
It can be made from many starches, even banana starch.6Starch – Stärke. Preparation and partial characterization of low dextrose equivalent (DE) maltodextrin from banana starch produced by enzymatic hydrolysis Enzyme-made maltodextrin is considered natural, while acid-made is considered synthetic under some organic standards.7Organic Materials Review Institute. Maltodextrin Labels rarely list the DE or the source starch, so you may need to ask the maker. In some countries, wheat-based versions may say “wheat” in the allergen statement.
On a nutrition panel, maltodextrin is not usually counted as added sugar, because by definition it isn’t a sugar. It still supplies about 4 calories per gram, the same as sugar. Ingredient lists are ordered by weight, so its position gives a rough idea of how much is there, though the total carbohydrate line is the better guide.
Why Maltodextrin Is in So Many Foods
Maltodextrin can replace some of the sugar or fat in a recipe while keeping the texture.8PubMed Central. Nutrition, Health, and Regulatory Aspects of Digestible Maltodextrins That’s why it turns up in ice cream, instant mixes, candy, cereals, snacks and drinks.9PubMed Central. Nutrition, Health, and Regulatory Aspects of Digestible Maltodextrins It dissolves easily, tastes neutral and stays fairly thin even in large amounts.10PubMed Central. Spray-Drying Microencapsulation of Natural Bioactives: Advances in Sustainable Wall Materials You’ll often spot it in powdered drink mixes, seasoning blends and chips, where it carries flavor, and in protein powders and meal shakes, where it adds carbohydrate and smoothness.
The same powder works in very different products. In low-fat foods it binds water and thickens slightly, giving the smooth, rounded feel fat normally provides. In dry mixes such as soup or drink powders, it keeps particles from clumping and helps the powder pour and dissolve evenly. Because it is nearly flavorless, a maker can add bulk or body without changing the taste they designed.
Sweetener packets are a special case. Sucralose is over 600 times sweeter than sugar, so only a tiny pinch is needed.11Splenda. Why Are The Ingredients Maltodextrin And/Or Dextrose In Splenda Original (Sucralose) Packets And Granulated Products? | Splenda FAQ Maltodextrin and dextrose are added to give the packet volume you can measure like sugar.12Splenda. Why Are The Ingredients Maltodextrin And/Or Dextrose In Splenda Original (Sucralose) Packets And Granulated Products? | Splenda FAQ Splenda powder is only about 1.1% sucralose, and the rest is mostly these fillers.13Wikipedia. Splenda So even a “zero calorie” packet contains a little carbohydrate.
Maltodextrin also does a quieter job. When foods are dried into powders, it can form a protective coating around flavors, oils and antioxidants.14PubMed. Microencapsulation of bioactive compound extracts using maltodextrin and gum arabic by spray and freeze-drying techniques That helps shield them from oxygen that would spoil them.15PubMed Central. Spray-Drying Microencapsulation of Natural Bioactives: Advances in Sustainable Wall Materials
It is approved for food use with no set limit beyond good manufacturing practice.16Electronic Code of Federal Regulations. 21 CFR 184.1444 — Maltodextrin Regulators judged it safe at the levels foods normally use. That doesn’t mean any amount is healthy for blood sugar.
How Maltodextrin Affects Blood Sugar
Digestive enzymes break maltodextrin down so fast that it is absorbed at the same rate as pure glucose.17PubMed Central. Nutrition, Health, and Regulatory Aspects of Digestible Maltodextrins The insulin response is about the same as after drinking glucose.18PubMed Central. Nutrition, Health, and Regulatory Aspects of Digestible Maltodextrins It raises blood sugar as fast as glucose, or faster.19International Journal of Medical Science and Clinical Invention. Unveiling Hidden Sugars: A Critical Analysis of Maltodextrin as a Polysaccharide Additive in Processed Foods and Its Health Implications The “complex carbohydrate” label can make it sound slower than it is.20International Journal of Medical Science and Clinical Invention. Unveiling Hidden Sugars: A Critical Analysis of Maltodextrin as a Polysaccharide Additive in Processed Foods and Its Health Implications
Some versions are slower. Maltodextrin built with a different chain linkage was digested more slowly in people, and it raised blood sugar less an hour after eating.21Journal of Applied Glycoscience. Enzymatically Produced Maltodextrin with Different Linkage Mode and Its Effect on Blood Glucose Elevation
If you have diabetes or prediabetes, treat maltodextrin like sugar when counting carbs. Small amounts in seasonings matter little, while large amounts in shakes or sports drinks matter more. A sweetener packet has only about a gram of carbohydrate, but several add up. If you’re unsure about a new product, check your meter.
“Sugar-free” can still raise glucose. A label can say “sugar-free” or “0 g sugars” while the product contains maltodextrin, because maltodextrin is a chain of glucose rather than a sugar by the labeling definition. The fillers in sweeteners and diet products are digested into glucose all the same. The total carbohydrate line is where maltodextrin shows up, so that is the number to use when you’re watching blood sugar.
People differ in how their blood sugar responds to the same food, and eating it alongside protein, fat or fiber usually slows the rise. If you use a glucose meter, testing before a new product and again one to two hours after eating shows how your own body responds.
Maltodextrin and Gut Health
In many human trials maltodextrin is used as the “inactive” comparison, yet about 6 in 10 that checked found it changed gut bacteria.22PubMed Central. Validity of food additive maltodextrin as placebo and effects on human gut physiology: systematic review of placebo-controlled clinical trials The changes went in different directions from study to study.23PubMed Central. Validity of food additive maltodextrin as placebo and effects on human gut physiology: systematic review of placebo-controlled clinical trials So it may not be as inert as assumed, but no clear harm has been shown in people.
A shift in bacteria is a measurement, not a symptom, and the gut community changes with many foods. Because studies found changes in different directions, researchers can’t yet say whether maltodextrin helps, harms or does neither.
The worrying evidence comes mostly from mice. In mice, maltodextrin reduced the cells that make the gut’s protective mucus.24PubMed Central. Maltodextrin Consumption Impairs the Intestinal Mucus Barrier and Accelerates Colitis Through Direct Actions on the Epithelium Bacteria then sat closer to the gut lining, and colitis worsened.25PubMed Central. Maltodextrin Consumption Impairs the Intestinal Mucus Barrier and Accelerates Colitis Through Direct Actions on the Epithelium In another mouse study it depleted the main mucus protein.26PubMed Central. The Food Additive Maltodextrin Promotes Endoplasmic Reticulum Stress–Driven Mucus Depletion and Exacerbates Intestinal Inflammation Mice often get doses much larger relative to body size than people eat, and mouse guts and bacteria differ from human ones, so these studies flag a question for human research, not an answer.
Crohn’s disease is the other concern. In lab dishes, maltodextrin helped a type of E. coli linked to Crohn’s disease stick to gut cells and form dense films.27PubMed Central. Crohn’s Disease-Associated Adherent-Invasive Escherichia coli Adhesion Is Enhanced by Exposure to the Ubiquitous Dietary Polysaccharide Maltodextrin It had the same effect on several E. coli strains.28PubMed Central. Deregulation of intestinal anti-microbial defense by the dietary additive, maltodextrin These are lab findings that suggest a possible contributing factor, not proof that it causes Crohn’s.29PubMed Central. Crohn’s Disease-Associated Adherent-Invasive Escherichia coli Adhesion Is Enhanced by Exposure to the Ubiquitous Dietary Polysaccharide Maltodextrin
Sticking to gut cells in a dish is one step in a long chain; it doesn’t show that eating maltodextrin leads to disease in a living person. Crohn’s has many contributing factors, including genetics and the immune system.
No human trial has shown that maltodextrin worsens Crohn’s or colitis. Some people with inflammatory bowel disease choose to limit it given the lab findings. It’s worth discussing any diet change with your gastroenterologist rather than cutting foods blindly, and a symptom diary can show whether specific products bother you.
Is Maltodextrin Gluten-Free
People with celiac disease who ate wheat-based maltodextrin and glucose syrup daily for 24 weeks showed no gut damage or inflammation.30PubMed. Clinical trial: gluten microchallenge with wheat-based starch hydrolysates in coeliac disease patients – a randomized, double-blind, placebo-controlled study to evaluate safety Their symptoms and blood tests didn’t differ from those of people given a placebo.31PubMed. Clinical trial: gluten microchallenge with wheat-based starch hydrolysates in coeliac disease patients – a randomized, double-blind, placebo-controlled study to evaluate safety Wheat-derived maltodextrin is therefore considered safe on a gluten-free diet.32PubMed. Clinical trial: gluten microchallenge with wheat-based starch hydrolysates in coeliac disease patients – a randomized, double-blind, placebo-controlled study to evaluate safety Making maltodextrin strips out nearly all the wheat protein that triggers celiac disease, and most maltodextrin in the US is made from corn anyway.
Other ingredients in the same product can still contain gluten. Certified gluten-free labels remain the simplest check.
Resistant Maltodextrin Works More Like Fiber
Resistant maltodextrin, often labeled soluble corn fiber or Fibersol, is mostly not digested in the small intestine.33PubMed. Availability, fermentability, and energy value of resistant maltodextrin: modeling of short-term indirect calorimetric measurements in healthy adults It provides roughly 7 kJ per gram instead of about 17, under half the calories.34PubMed. Availability, fermentability, and energy value of resistant maltodextrin: modeling of short-term indirect calorimetric measurements in healthy adults It also increases stool bulk and the number of gut bacteria at doses of 25 to 50 g a day.35PubMed. The metabolizable energy of dietary resistant maltodextrin is variable and alters fecal microbiota composition in adult men At 25 g a day, it more than doubled a beneficial fiber-eating gut bacterium.36PubMed Central. Resistant Maltodextrin Consumption in a Double-Blind, Randomized, Crossover Clinical Trial Induces Specific Changes in Potentially Beneficial Gut Bacteria
Regular maltodextrin has links between glucose units that digestive enzymes cut easily. The fiber version is rearranged so many links can’t be cut. The undigested part travels to the large intestine, where gut bacteria ferment it, which is how it acts like fiber. That’s why the same starting material, corn starch, can end up as a fast sugar-like ingredient or a fiber ingredient depending on processing.
Plain “maltodextrin” is the fast-digested kind. “Resistant maltodextrin,” “soluble corn fiber” or “digestion-resistant maltodextrin” is the fiber kind. It often appears in the dietary fiber count on the nutrition panel, and products that add it tend to advertise high fiber.
Reviews suggest the fiber version may improve blood sugar, insulin response, blood fats and weight.37PubMed. Resistant Maltodextrin and Metabolic Syndrome: A Review In one trial, 12 weeks lowered HbA1c, a three-month blood sugar average, from 5.5% to 5.2%.38PubMed Central. Tapioca Resistant Maltodextrin as a Carbohydrate Source of Oral Nutrition Supplement (ONS) on Metabolic Indicators: A Clinical Trial Ten grams with a meal delayed hunger for 1.5 to 2 hours and raised fullness hormones.39PubMed. Soluble dietary fiber (Fibersol-2) decreased hunger and increased satiety hormones in humans when ingested with a meal Continuous use in a trial caused no serious side effects.40Journal of Nutritional Science and Vitaminology. Visceral Fat-Reducing Effect and Safety of Continuous Consumption of Beverage Containing Resistant Maltodextrin: A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Clinical Trial
The HbA1c drop began from a normal-range starting point, so it doesn’t show that the fiber treats diabetes. Fullness effects from a single 10 g dose show a short-term response, not necessarily lasting weight loss.
Like other fibers, large doses can cause gas or loose stools. Starting small and increasing gradually helps, as does drinking enough water.
Maltodextrin and Your Teeth
Rinsing with maltodextrin dropped plaque acidity less than a sugar rinse did.41PubMed. An evaluation of the acidogenic potential of maltodextrins in vivo The drop was still large enough to potentially wear enamel.42PubMed. An evaluation of the acidogenic potential of maltodextrins in vivo Saliva quickly breaks maltodextrin into sugars that mouth bacteria can ferment.43British Journal of Nutrition. Properties of maltodextrins and glucose syrups in experiments in vitro and in the diets of laboratory animals, relating to dental health Rats fed solid foods containing it developed unexpectedly high levels of cavities.44British Journal of Nutrition. Properties of maltodextrins and glucose syrups in experiments in vitro and in the diets of laboratory animals, relating to dental health Too few human studies exist to judge its true cavity risk.45RGO – Revista Gaúcha de Odontologia. Maltodextrin and dental caries: a literature review
Cavities form when mouth bacteria ferment carbohydrates into acid that dissolves enamel, and any ferment-ready carbohydrate can feed that process. Maltodextrin’s smaller acid drop is likely tied to its slower breakdown into sugars in the mouth, but the breakdown still happens. The rat finding hints that sticky solid forms may be a particular problem, though rats are not people.
Sticky snacks and frequent sips of sports drinks expose teeth the longest. Rinsing with water afterward helps, and brushing with fluoride toothpaste twice a day remains the main protection.
Maltodextrin in Sports Drinks
Because it absorbs like glucose, maltodextrin is a quick carbohydrate fuel during exercise.46PubMed Central. Nutrition, Health, and Regulatory Aspects of Digestible Maltodextrins Mixed with fructose during an hour-long run, it reduced inflammation markers afterward.47PubMed Central. Effects of Maltodextrin–Fructose Supplementation on Inflammatory Biomarkers and Lipidomic Profile Following Endurance Running: A Randomized Placebo-Controlled Cross-Over Trial Taken before leg-press training, it didn’t improve performance.48PubMed Central. Acute Maltodextrin Supplementation During Resistance Exercise After exercise, a fructose blend and a glucose blend led to the same next-day performance.49PubMed Central. Impact of Post-Exercise Fructose-Maltodextrin Ingestion on Subsequent Endurance Performance
During prolonged effort the body draws down its stored carbohydrate, and taking in fast carbohydrate helps keep blood glucose steady. Maltodextrin is popular in drinks because it supplies a lot of carbohydrate without tasting as sweet or as thick as the same amount of plain sugar. Small, regular amounts during the effort are generally easier on the stomach than one large dose.
Athletes training over an hour at moderate to high intensity benefit most. Many gels combine maltodextrin and fructose because the body absorbs them through different routes, so more carbohydrate can be taken in at once. Casual exercisers usually don’t need sports drinks.