What Is Erythritol and Why Is It Used So Often?
Erythritol is a type of sugar alcohol widely used as a sugar substitute in foods and beverages. It is typically produced by fermenting corn, a common method in food technology. With almost no calories and a clean, sweet taste, it’s about 60–80% as sweet as table sugar. One of its biggest advantages is that it doesn’t raise blood sugar levels, making it a popular choice for people watching their glucose or following a low-carb lifestyle.
You’ll often see erythritol paired with stevia in “keto” chocolates, monk fruit blends, protein bars, and tabletop sweeteners. The things is, stevia is hundreds of times sweeter than sugar but can have a bitter or licorice-like aftertaste. Erythritol adds bulk, texture, and a smoother sweetness, which is why many “stevia” products are actually mostly erythritol.
This combination of low calories, blood sugar neutrality, and sugar-like flavor has earned erythritol a reputation as the “perfect” sweetener. But like most things in nutrition, the story is more nuanced.
Why Erythritol Became So Popular Among Sugar Substitutes
The rise of “glucose-free” lifestyles — from low-carb to keto — put artificial sweeteners front and center. Consumers wanted the sweet taste of sugar substitutes without the calories of table sugar or the blood sugar spikes. Erythritol filled that gap.
- It has fewer calories than other sugar alcohols like maltitol or xylitol.
- It doesn’t trigger digestive upset at modest doses (compared to sorbitol or mannitol).
- It offers a more “sugar-like” taste than high-intensity artificial sweeteners like saccharin or acesulfame potassium.
These traits made erythritol one of the most common sugar alternatives in modern processed foods. Today, it’s in soft drinks, chewing gum, sugar-free candies, tabletop sweeteners, protein bars, and even keto-friendly baking mixes.
Is Erythritol 100% Safe? What Recent Studies Suggest
For years, erythritol was considered one of the safer sweeteners. But in 2023, Nature Medicine reported that people with higher blood erythritol levels had nearly double the risk of cardiovascular events like heart attack or stroke. This study was observational — it showed correlation, not causation — but it raised important questions.
In 2024, another study in Arteriosclerosis, Thrombosis, and Vascular Biology found that when healthy volunteers consumed a 30-gram erythritol drink, their blood erythritol spiked dramatically, stayed elevated for over 48 hours, and made their platelets — the blood cells involved in clotting — more reactive.
This doesn’t mean erythritol causes heart attacks. What it suggests is that very large single doses may temporarily shift the body’s clotting response, which matters most for people with existing cardiovascular risk. Smaller, spread-out amounts are unlikely to have the same effect, but stacking “sugar-free” products in one sitting could reach the levels tested in these studies.
Where Does Erythritol Hide in Everyday Foods?
Erythritol isn’t just in little tabletop packets — it shows up in many everyday “sugar-free” or “low-carb” favorites. Because it’s often blended with stevia or monk fruit, people may not realize that erythritol is actually the main ingredient.
Some common places you’ll find it include:
- Chocolate bars and candy marketed as “keto-friendly” – Brands like Lily’s or SmartSweets rely on erythritol for sweetness. A single bar or bag can provide 15–20 g.
- Protein bars and snacks – No Cow, Quest, and other “healthy” bars frequently include erythritol, typically 3–6 g each.
- Sugar alternatives for baking – Products like Swerve, Lakanto, or King Arthur’s Sugar Alternative are primarily erythritol, designed to replace sugar cup-for-cup.
- Keto ice creams – Halo Top, Rebel, and similar brands use erythritol to lower sugar content, often 6–8 g per serving.
- Tabletop blends – Truvia packets or Lakanto “monk fruit” blends are mostly erythritol, even if the label emphasizes stevia or monk fruit.
Why is this important? Because it’s surprisingly easy to reach the same amounts tested in research (around 30 g in one sitting) without realizing it. For example, a protein bar plus a few coffees with Truvia plus a slice of keto dessert can get you there in a single day.
Knowing where erythritol hides doesn’t mean you need to avoid it completely — it simply helps you stay aware of your intake, use it in moderation, and choose a variety of sweetener options so your body isn’t overloaded.
How Much Erythritol Is in Popular Products?
Serving sizes can be deceiving. A square of chocolate or a single protein bar may not seem like much, but when you look closely at nutrition labels, the erythritol content can add up quickly. For example, a typical serving of Lily’s chocolate lists about 7 grams of erythritol — but if you eat the whole bar, that’s over 20 grams. A pint of keto ice cream often contains 20–30 grams if finished in one sitting, and some baking mixes or sugar replacements deliver 20 grams or more in a single slice of cake or batch of cookies.
Understanding these numbers is important because many of the human studies raising questions about erythritol used a 30-gram single dose. While most people won’t reach that from one packet of Truvia or a single protein bar, combining products throughout the day makes it easy to approach that level without realizing it. Awareness gives you choice — you can enjoy these products in moderation, spread them out, and rotate with other options like stevia, monk fruit, or allulose to balance your intake.
To make it clear, here’s a breakdown of some of the most popular “sugar-free” and “keto-friendly” items — and how much erythritol they actually contain per serving.
| Product | Sweeteners Used | Approx. Erythritol Per Serving | Notes |
| Lily’s Chocolate Bars | Erythritol + Stevia | ~7 g per serving (21 g per bar) | Easy to finish a bar and reach 30 g threshold. |
| No Cow Bars | Erythritol + Stevia | ~6 g | Adds up if combined with other snacks. |
| Truvia (3 packets) | Mostly erythritol | ~9 g total | Just a few coffees can add up quickly. |
| Lakanto Monkfruit Classic/Golden | Erythritol + Monk Fruit | ~4 g per tsp | “Monk fruit” products are mostly erythritol. |
| Swerve | 100% erythritol | ~4 g per tsp | Used heavily in keto recipes; easy to exceed 20–30 g. |
| Rebel / Halo Top Keto Ice Creams | Erythritol + Stevia/Monkfruit | ~6–8 g per ½ cup | A pint can reach 20–30 g. |
| SmartSweets (keto line) | Allulose + Erythritol + Stevia | ~8–12 g per bag | Marketed as low sugar, but sugar alcohol load is high. |
How Does Erythritol Work in the Body?
Unlike regular sugar, erythritol isn’t metabolized for energy. Most of it is absorbed into the bloodstream and then 80-90-% excreted unchanged in the urine. This means:
- It doesn’t raise blood sugar or insulin levels.
- It doesn’t contribute to tooth decay.
- It provides almost no calories.
This is why erythritol is classified as a nonnutritive sweetener. The FDA and EFSA (European Food Safety Authority) both consider it safe for human consumption.
What Do We Know About Long-Term Health Effects?
The health effects of sugar substitutes, including sugar alcohols like erythritol, have been widely studied.
- Cancer risk: According to the World Health Organization and the National Cancer Institute, there is no credible evidence linking erythritol to cancer.
- Weight & metabolism: Some observational studies have found associations between artificial sweetener consumption and weight gain or metabolic syndrome, but these are not conclusive.
- Diabetes: The American Diabetes Association recognizes that sugar substitutes, including erythritol, can help people manage blood glucose when used in moderation.
Consensus: Erythritol can be part of a healthy lifestyle, especially when used mindfully and not in excessive single doses.
Safety Takeaways from the Research
- Excretion: 80–90% of erythritol is excreted unchanged in urine.
- Animal studies: Mouse studies showed changes in platelet activity.
- Human studies: Small human trials using ~30 g in one sitting showed prolonged increases in blood erythritol and changes in clotting response.
- Translation: Watch how you stack your ‘sweeteners’ during the day
- A few coffees plus “sugar-free” snacks may equal the bolus used in these studies.
The Role of a Sugar Substitute in Reducing Health Risks
Sugar substitutes can be a helpful tool for reducing some of the health risks associated with consuming too much table sugar. By swapping out sugar for a sugar alcohol like erythritol or other sugar substitutes, you can lower your calorie intake, which may support weight loss and reduce the risk of obesity-related conditions such as diabetes and heart disease. These sweeteners also help manage blood sugar levels, making them especially useful for people with diabetes or those looking to prevent blood sugar spikes.
Another benefit is oral health—many sugar substitutes, particularly sugar alcohols, don’t contribute to tooth decay the way regular sugar does. However, it’s important to use sugar substitutes as part of a balanced diet that includes plenty of whole foods, fresh fruits, and vegetables. The FDA considers erythritol safe for human consumption, but as with any food additive, moderation is key and more research is always welcome to ensure long-term safety. Used wisely, sugar substitutes can help you enjoy sweet flavors while supporting your overall health goals.
Stephanie’s Recap: Should You Be Afraid of Erythritol?
Artificial sweeteners get a lot of attention — and sometimes a lot of bad press. So should you be afraid of erythritol? Let’s break it down:
- What it is: A sugar alcohol that’s almost calorie-free, has little to no aftertaste, and doesn’t spike blood sugar. That’s why it’s in so many “keto” chocolates, protein bars, and sugar-free drinks.
- What the science says:
- The World Health Organization and the National Cancer Institute have found no evidence that erythritol causes cancer.
- Some observational studies link artificial sweeteners in general to weight or metabolic risk, but they don’t prove cause and effect.
- The big studies in 2023–2024 tested large single doses (~30 g at once). Those showed higher blood erythritol levels for over 48 hours and more platelet activity. This is most relevant for people who already have cardiovascular risk.
- The takeaway: Don’t panic. For most people, erythritol can be used safely in moderation. If you have cardiovascular concerns, minimize it. For everyone else, spread out intake and remember: be mindful, not fearful.
Closing Reframe: Balance Over Fear
Erythritol isn’t a villain, and it isn’t a free pass either. Like most foods, dose and context matter. Knowing where it hides and respecting the ~30 g single-dose threshold can help you enjoy the benefits — sweetness without the blood sugar spike — without unintended consequences.