Erythritol is a sugar alcohol (polyol) that provides about 70% of the sweetness of table sugar with nearly zero calories. At just 0.2 calories per gram, compared to sugar’s 4 calories per gram, it has become one of the most popular sugar substitutes in low-carb and keto products. It also has a glycemic index of zero, meaning it doesn’t raise blood sugar at all. But erythritol has a more complicated story than most sweetener labels suggest.
Where Erythritol Comes From
Erythritol occurs naturally in small amounts in certain fruits, mushrooms, algae, fungi, and lichens. Fermented foods like wine and soy sauce also contain trace quantities. The erythritol in packaged foods, though, isn’t extracted from fruit. It’s produced industrially through fermentation, where yeast strains convert glucose (usually derived from corn starch) into erythritol under high-osmotic-stress conditions. Several yeast genera are used in commercial production, with species of Yarrowia, Moniliella, and Candida among the most common.
How Your Body Handles It
Erythritol behaves differently from other sugar alcohols in one important way: your small intestine absorbs most of it before it ever reaches your colon. Because it’s a smaller molecule than sugar alcohols like xylitol or sorbitol, it passes through the intestinal wall relatively quickly. Once absorbed, your body doesn’t break it down or use it for energy. Roughly 80 to 90 percent of what you consume shows up unchanged in your urine within 24 to 48 hours.
The small portion that isn’t absorbed in the small intestine passes into the large intestine, but studies show it doesn’t get fermented by gut bacteria there either. This is why erythritol causes far less bloating, gas, and diarrhea than other sugar alcohols. It essentially passes through your system without being metabolized at any point.
Digestive Tolerance and Laxative Threshold
While erythritol is gentler on the gut than its sugar alcohol relatives, it can still cause digestive issues at high doses. Research on laxative thresholds found that women tolerated up to 0.80 grams per kilogram of body weight before experiencing symptoms, while men hit that threshold at a lower dose of 0.66 grams per kilogram. For a 150-pound (68 kg) person, that works out to roughly 45 to 54 grams in a single sitting.
In practical terms, most erythritol-sweetened products contain far less than that per serving. A single packet or a few cookies sweetened with erythritol is unlikely to cause problems. Tolerance also improves with repeated use, and spreading intake across multiple meals throughout the day raises the threshold further. Still, if you’ve eaten a large amount of erythritol-sweetened ice cream or baked goods in one go and felt stomach discomfort, the dose is the likely explanation.
The Cardiovascular Concern
A 2023 study published in Nature Medicine raised significant questions about erythritol’s safety. Researchers at the Cleveland Clinic measured blood levels of erythritol in over 4,000 patients undergoing cardiac evaluation across both U.S. and European cohorts. Higher circulating levels of erythritol were associated with increased three-year risk of major adverse cardiovascular events, including heart attack, stroke, and death.
The study went beyond correlation. Lab experiments showed that erythritol at physiological levels increased platelet reactivity and promoted blood clot formation. In a small pilot intervention with eight healthy volunteers, drinking an erythritol-sweetened beverage caused plasma levels to spike well above the thresholds linked to increased clotting risk, and those elevated levels persisted for more than two days.
This research has important caveats. The patients studied were already at elevated cardiovascular risk, so the findings may not apply equally to healthy people. The body also produces erythritol naturally through a metabolic pathway, which means high blood levels in sick patients could be a consequence of disease rather than a cause. The FDA reviewed the study and noted that erythritol’s rapid absorption and excretion pattern complicates the interpretation. Still, these findings were striking enough to prompt ongoing investigation, and people with existing heart disease or clotting disorders have particular reason to pay attention.
Benefits for Dental Health
Unlike sugar, erythritol doesn’t feed the bacteria that cause tooth decay. Research shows that both erythritol and xylitol inhibit biofilm formation by Streptococcus mutans, the primary bacterium responsible for cavities. The effect isn’t just about starving bacteria of usable sugar. These polyols appear to interfere with how tightly bacterial colonies attach to tooth surfaces, reducing plaque buildup even when bacterial counts aren’t dramatically lowered.
In head-to-head comparisons, some bacterial strains are more sensitive to xylitol and others to erythritol, so neither polyol is categorically better. Both are used in sugar-free gums and mints marketed for dental health. This non-cavity-promoting property is one reason erythritol has been widely adopted in oral care products.
Cooking and Baking With Erythritol
Erythritol is heat-stable and doesn’t break down at normal baking temperatures, with crystals melting at about 122°C (252°F). It also lacks the chemical groups needed to participate in the Maillard reaction, the process that gives baked goods their golden-brown color and toasty flavor. This means cookies and cakes made with erythritol won’t brown the way sugar-based versions do, and they’ll lack some of the caramelized depth of flavor.
Because erythritol is only about 70 to 75 percent as sweet as sugar at typical concentrations, recipes often need more of it to match the expected sweetness, or it gets blended with a high-intensity sweetener like stevia or monk fruit to close the gap. One quirk that catches people off guard is erythritol’s cooling sensation on the tongue, similar to mint but without the flavor. This effect is most noticeable in frostings, candies, and other applications where erythritol crystals dissolve directly in your mouth. Erythritol can also recrystallize as baked goods cool, giving some products a slightly gritty texture.
Regulatory Status
The FDA classifies erythritol as Generally Recognized as Safe (GRAS), meaning manufacturers can use it in food without special approval. The World Health Organization’s Joint Expert Committee on Food Additives reviewed erythritol in 1999 and set its acceptable daily intake as “not specified,” a designation reserved for substances considered to have very low toxicity, meaning no numerical limit was deemed necessary based on the evidence at the time.
That said, these safety evaluations predated the 2023 cardiovascular findings. Regulatory agencies have not changed erythritol’s status in response to that research, but the science is still evolving. For most people, erythritol remains a practical low-calorie sweetener with real advantages over sugar, particularly for blood sugar management and dental health. The cardiovascular question, however, is one worth watching.