{"id":50494,"date":"2026-06-05T11:26:12","date_gmt":"2026-06-05T05:56:12","guid":{"rendered":"https:\/\/blog.ultrahuman.com\/blog\/?p=50494"},"modified":"2026-06-05T11:36:22","modified_gmt":"2026-06-05T06:06:22","slug":"what-is-erythritol","status":"publish","type":"post","link":"https:\/\/blog.ultrahuman.com\/blog\/what-is-erythritol\/","title":{"rendered":"What Is Erythritol? Calories, Glucose Effect, and Safety"},"content":{"rendered":"\n

Erythritol is a low-calorie sweetener that tastes about 60-80% as sweet as table sugar, has near-zero calories (0.2 kcal\/g), doesn’t raise blood sugar or insulin in healthy adults, and is classified as Generally Recognized as Safe (GRAS) by the US Food and Drug Administration and reaffirmed as safe at typical dietary intakes by the European Food Safety Authority (EFSA) in its 2023 re-evaluation. A 2023 Nature Medicine<\/em> observational study<\/a> raised questions about whether high circulating erythritol levels are associated with cardiovascular events (Witkowski et al., Nat Med<\/em> 2023, PMID 36849732<\/a>) \u2014 a finding that triggered considerable media coverage and ongoing scientific debate.<\/p>\n\n\n\n

This guide walks through what erythritol is and where it comes from, what controlled trials show about its effect on blood sugar, how it compares to sugar in calories and sweetness, the unresolved cardiovascular safety question, common digestive side effects, and how a continuous glucose monitor or smart ring can help you understand its real-world effect on your own body.<\/p>\n\n\n\n

What erythritol is and where it comes from<\/h2>\n\n\n\n

Erythritol is a sweetener that occurs naturally in small amounts in fruits like pears and watermelon, and in fermented foods like wine and soy sauce. The erythritol sold commercially is made by yeast fermentation of corn glucose \u2014 a process first introduced in Japan in the 1990s. It received Generally Recognized As Safe (GRAS) status from the FDA in 1997, was first approved as a food additive by the European Food Safety Authority in 2003, and was reaffirmed by EFSA’s 2023 re-evaluation as safe at typical dietary intakes.<\/p>\n\n\n\n

In the body, erythritol is absorbed quickly in the small intestine (around 90% absorption)<\/a>, travels through the bloodstream, and is excreted essentially unchanged in urine within 24-48 hours. Most of it gets absorbed before reaching the colon, which is why it tends to cause fewer digestive symptoms than other sugar alcohols like xylitol, maltitol, or sorbitol.<\/p>\n\n\n\n

Erythritol and blood sugar \u2014 what the research shows<\/h2>\n\n\n\n

In controlled human trials, erythritol has no meaningful effect on blood sugar or insulin in healthy adults or in adults with obesity. The Wolnerhanssen 2021 trial published in Nutrients<\/em><\/a> gave adults with obesity erythritol or xylitol daily for 4 weeks and found that erythritol didn’t affect blood-sugar control after meals (W\u00f6lnerhanssen et al., Nutrients<\/em> 2021, PMID 34836205<\/a>).<\/p>\n\n\n\n

A follow-up dose-ranging study published in the International Journal of Molecular Sciences<\/em><\/a> confirmed that single servings of erythritol caused minimal blood-sugar or insulin response across all doses tested, consistent with erythritol’s glycemic index of 0 \u2014 the lowest possible score on the scale that measures how much a food raises blood sugar (W\u00f6lnerhanssen et al., IJMS<\/em> 2022, PMID 36077269<\/a>).<\/p>\n\n\n\n

The reason is simple: the body doesn’t break erythritol down for energy. It’s absorbed, circulates briefly in the bloodstream, and is filtered out by the kidneys \u2014 no rise in blood sugar, no insulin response. For people managing blood sugar \u2014 prediabetes, type 2 diabetes, or athletes optimizing fueling \u2014 erythritol is one of the cleanest sweeteners from a glycemic standpoint.<\/p>\n\n\n\n

Calorie content and sweetness compared to sugar<\/h2>\n\n\n\n

Erythritol provides approximately 0.2 calories per gram, compared to 4 calories per gram for sucrose (table sugar). On a sweetness basis, erythritol is roughly 60-80% as sweet as sugar, depending on the food matrix. In a typical recipe replacement, slightly more erythritol is used to match sugar’s sweetness:<\/p>\n\n\n\n