Erythritol: The Sweetener That Breaks the Rules
Erythritol is a sugar alcohol that differs from other sweeteners in several important ways: it contains virtually zero calories, does not raise blood sugar, and does not cause the digestive issues typical of other sugar alcohols like xylitol or sorbitol (Munro et al., 1998).
This guide will help you understand the science behind erythritol, compare it with other sweeteners, and evaluate the controversial 2023 study that triggered media panic.
TL;DR
- Erythritol contains ~0.2 kcal/g (vs sugar's 4 kcal/g) — virtually zero calories
- Glycemic index of 0 — does not affect blood sugar or insulin levels (Ishikawa et al., 1996)
- ~90% is absorbed in the small intestine and excreted unchanged in urine — no digestive issues
- The 2023 Cleveland Clinic study found an association between blood erythritol levels and heart disease, but has important limitations
- Safe in reasonable amounts (up to 50g daily) for most people
- Sweetness is ~60-70% of sugar
What Is Erythritol?
Erythritol (C₄H₁₀O₄) is a four-carbon sugar alcohol found naturally in small amounts in fruits (grapes, pears, melons) and fermented foods like wine and cheese. Commercially, it is produced by fermenting corn or wheat starch (Munro et al., 1998).
How Does It Differ From Other Sugar Alcohols?
| Property | Erythritol | Xylitol | Sorbitol | Sugar |
|---|---|---|---|---|
| Calories (per g) | 0.2 | 2.4 | 2.6 | 4.0 |
| Glycemic index | 0 | 7 | 9 | 65 |
| Sweetness (vs sugar) | 60-70% | 100% | 60% | 100% |
| Digestive issues | Minimal | Moderate | Significant | No |
| Dental health | Protective | Protective | Neutral | Harmful |
The key difference: erythritol is absorbed in the small intestine before reaching the colon, where other sugar alcohols cause fermentation and gas. That is why erythritol's digestive tolerance is much better (Bernt et al., 1996).
Benefits of Erythritol
Zero-Calorie Alternative
Since ~90% of erythritol is absorbed and excreted unchanged via the kidneys, its actual caloric value is near zero. This makes it ideal for weight management programs.
Diabetes-Friendly
Erythritol does not stimulate insulin secretion or raise blood glucose (Ishikawa et al., 1996). This is particularly important for type 2 diabetics and people with insulin resistance.
Dental Protection
Unlike sugar, oral bacteria cannot ferment erythritol. Studies show that erythritol may actually reduce plaque formation and cavities (de Cock et al., 2016).
Antioxidant Properties
Less well known is that erythritol is a free radical scavenger. In vitro studies show it may protect blood vessels from oxidative stress (den Hartog et al., 2010).
The 2023 Heart Study: What Was Actually Found?
In 2023, a Cleveland Clinic team (Witkowski et al., 2023) published a study finding an association between high blood erythritol levels and increased cardiovascular disease risk. The media headline was alarming, but the science is more nuanced.
What the study actually said:
- Studied patients who already had existing cardiovascular risk factors
- Found a correlation (not causation) between blood erythritol levels and heart disease
- The body produces erythritol endogenously from glucose — high levels may reflect a metabolic problem, not a dietary supplement effect
- An in vitro experiment showed erythritol could increase platelet reactivity
What the study did not say:
- Did not prove that dietary erythritol causes heart disease
- Did not study healthy individuals
- Was not an intervention study (did not give people extra erythritol)
Bottom line: If you are healthy, there is no reason based on current evidence to avoid erythritol. If you have existing heart disease, consult your doctor.
How to Use
Baking and Cooking
- Replace sugar at a 1.3:1 ratio (erythritol is less sweet)
- Does not caramelize like sugar
- At high concentrations it can crystallize — blend with other sweeteners
In Drinks
- Dissolves well in cold beverages
- Does not leave an aftertaste like stevia
Recommended Daily Amount
- Up to 50g per day is well-tolerated by most people (Bernt et al., 1996)
- Start with smaller amounts and increase gradually
Common Mistakes
1. Too much at once — Although erythritol is better tolerated than other sugar alcohols, over 50g at once can cause mild stomach discomfort.
2. Expecting it to taste like sugar — Erythritol is ~30% less sweet and gives a "cooling" sensation in the mouth. This is a feature, not a defect.
3. Following media panic — One observational study is not sufficient reason to avoid a well-studied sweetener.
4. Feeding to pets — Unlike xylitol, erythritol is safe for dogs, but be cautious with other animals.
FAQ
Is erythritol natural?
Yes, erythritol is found naturally in fruits and fermented foods. Commercial production uses natural fermentation.
Is erythritol suitable for keto?
Absolutely. Erythritol has a glycemic index of 0 and does not affect ketosis. It is one of the most popular sweeteners in the keto community.
Does erythritol cause bloating?
Usually not. Unlike xylitol and sorbitol, erythritol is absorbed before reaching the colon, which significantly reduces gas and bloating risk.
Can erythritol be heated?
Yes, erythritol is thermally stable up to 160C. Works well for baking but does not caramelize.
References
1. Munro, I.C., Berndt, W.O., Borzelleca, J.F., Flamm, G., Lynch, B.S., Kennepohl, E., Bär, E.A. & Modderman, J. (1998). Erythritol: an interpretive summary of biochemical, metabolic, toxicological and clinical data. Food and Chemical Toxicology, 36(12), 1139–1174.
2. Ishikawa, M., Miyashita, M., Kawashima, Y., Nakamura, T., Saitou, N. & Modderman, J. (1996). Effects of oral administration of erythritol on patients with diabetes. Regulatory Toxicology and Pharmacology, 24(2), S303–S308.
3. Bernt, W.O., Borzelleca, J.F., Flamm, G. & Munro, I.C. (1996). Erythritol: a review of biological and toxicological studies. Regulatory Toxicology and Pharmacology, 24(2), S191–S197.
4. Witkowski, M., Nemet, I., Alamri, H., et al. (2023). The artificial sweetener erythritol and cardiovascular event risk. Nature Medicine, 29(3), 710–718.
5. de Cock, P., Mäkinen, K., Honkala, E., Saag, M., Kennepohl, E. & Eapen, A. (2016). Erythritol is more effective than xylitol and sorbitol in managing oral health endpoints. International Journal of Dentistry, 2016, 9840594.
6. den Hartog, G.J.M., Boots, A.W., Adam-Perrot, A., et al. (2010). Erythritol is a sweet antioxidant. Nutrition, 26(4), 449–458.
See also:
- Xanthan Gum: What It Is and Why It Is in Your Food
- FitLine: Honest Review of PM-International Supplements
- Pau d'Arco (Ant Tree Bark): A Honest Look at This Traditional Remedy
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