Xylitol (INS 967): A Complete Guide to Its Safety, Uses, and Benefits
Answer Snapshot
- What it is: A naturally occurring sugar alcohol (polyol) found in plants, produced commercially from birch wood or corn cobs.
- Safety consensus: JECFA, FDA, and EFSA confirm it’s safe at typical intake levels; acceptable daily intake (ADI) is 50 mg/kg body weight.
- Common uses: Sugar-free gums, candies, baked goods, oral care products, and diabetic-friendly foods.
- Blood sugar impact: Minimal effect with a glycemic index (GI) of 7, suitable for people with diabetes.
- Who should be careful: Those with sensitive digestive systems (excess may cause bloating/diarrhea) and pet owners (toxic to dogs).
- Label names / aliases: Xylitol, birch sugar, INS 967, E967.
Quick Facts Table
| Field | Details |
|---|---|
| Ingredient Name | Xylitol |
| INS Code | 967 |
| Functional Class | Sweetener, Humectant, Bulking Agent |
| Sweetness Potency | ~100% of sucrose (same as table sugar) |
| Caloric Value | 2.4 kcal/g (theoretical; practically negligible glycemic impact) |
| ADI | 50 mg/kg body weight/day (JECFA) |
| Stability | Heat stable up to 216°C; pH stable between 3.0–9.0 |
| Blood Sugar Impact | GI of 7, minimal insulin response |
| Typical Label Names | Xylitol, birch sugar, INS 967, E967 |
What is Xylitol (INS 967)?
Xylitol (INS 967, E967) is a sugar alcohol (polyol)—a type of carbohydrate that shares properties with both sugars and alcohols but is metabolized differently in the human body. It occurs naturally in small amounts in many plants, including berries, mushrooms, corn cobs, and birch bark. Commercially, it’s produced by hydrolyzing xylan (a plant fiber) from birch wood or corn cobs to xylose, then hydrogenating xylose to form xylitol. Chemically, it has the formula C₅H₁₂O₅, with five carbon atoms, making it a pentitol. Unlike sucrose (table sugar), xylitol does not contribute to tooth decay and has a minimal impact on blood glucose levels.
Is Xylitol safe to consume?
Yes, xylitol is recognized as safe by leading global regulatory bodies. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) established an acceptable daily intake (ADI) of 50 mg per kilogram of body weight, meaning a 70 kg adult can safely consume up to 3.5 grams daily without adverse effects. The U.S. FDA has classified xylitol as Generally Recognized as Safe (GRAS), and the European Food Safety Authority (EFSA) confirms its safety for all population groups, including children and pregnant women.
The most common side effect is digestive discomfort (bloating, diarrhea, flatulence) when consumed in excess (typically over 20–30 grams per day for adults), as the human body lacks the enzyme to fully digest polyols. These effects are temporary and resolve with reduced intake. A critical note: Xylitol is highly toxic to dogs, even in small amounts, as it causes a rapid insulin release leading to hypoglycemia (low blood sugar) and potential liver failure. Pet owners should keep xylitol-containing products out of reach.
Does Xylitol raise blood sugar or affect metabolism?
Xylitol has an extremely low glycemic index (GI) of 7, compared to sucrose’s GI of 60–65. This means it causes only a minimal increase in blood glucose levels and requires very little insulin to be metabolized. Most xylitol is absorbed slowly in the small intestine; unabsorbed portions are fermented by beneficial gut bacteria in the colon, producing short-chain fatty acids that support gut health.
For people with type 2 diabetes, xylitol is a suitable sugar alternative because it does not spike blood sugar levels. Studies also show xylitol may improve insulin sensitivity in some individuals, though more research is needed. Its low caloric value (2.4 kcal/g, vs. sucrose’s 4 kcal/g) makes it useful for weight management when used as a sugar replacement.
Is Xylitol heat stable and pH stable?
Xylitol is highly stable under a wide range of processing conditions, making it versatile for various food applications. It has a melting point of 216°C, so it remains heat stable during baking, cooking, and pasteurization without losing its sweetness or breaking down into harmful compounds. This allows it to be used in baked goods, hot beverages, and processed foods that require high-temperature processing.
In terms of pH stability, xylitol performs well in both acidic and alkaline environments, with a stable range between pH 3.0 and 9.0. This means it can be used in acidic products like fruit juices, sodas, and sour candies, as well as alkaline products like bread and cakes, without degradation. Its stability also extends to storage, as it does not crystallize easily and retains its texture over time.
What foods and products commonly contain Xylitol?
Xylitol is widely used in sugar-free and low-calorie foods, as well as oral care products. According to the Codex Alimentarius General Standard for Food Additives (GSFA), it is approved for use in:
- Sugar-free chewing gums, mints, and candies (the most common application)
- Baked goods, including bread, cookies, and pastries (as a sugar replacement and humectant)
- Diabetic-friendly foods and meal replacements
- Breakfast cereals and granola bars
- Oral care products: toothpaste, mouthwash, and dental floss (due to its cavity-preventing properties)
- Pharmaceuticals: syrups, lozenges, and chewable tablets (as a sweetener and bulking agent)
- Milk and milk derivative products (energy-reduced or no-added-sugar varieties)
How does Xylitol compare with other sweeteners or alternatives?
When compared to other sugar alternatives, xylitol offers unique benefits:
- Vs. Sucrose: Same sweetness level, 40% fewer calories, no cavity risk, and minimal blood sugar impact.
- Vs. Sorbitol: Xylitol is sweeter (100% vs. 60% of sucrose) and less likely to cause digestive issues at equivalent intake levels.
- Vs. Stevia: Xylitol has a clean, sugar-like taste with no bitter aftertaste, unlike stevia. It also acts as a bulking agent, so it can replace sugar’s texture in baked goods without needing additional fillers.
- Vs. Erythritol: Xylitol does not have the cooling aftertaste common with erythritol and has stronger cavity-preventing properties. Erythritol has zero calories, but xylitol provides more texture in formulations.
- Vs. High-Intensity Sweeteners (e.g., Aspartame, Sucralose): Xylitol is a bulk sweetener, so it can replicate sugar’s volume and mouthfeel in recipes, whereas high-intensity sweeteners require bulking agents (like maltodextrin) to match sugar’s texture.
What does Xylitol taste like, and what functional roles does it play in food?
Xylitol has a clean, pure sweet taste that is nearly identical to table sugar, with no bitter or metallic aftertaste. This makes it a popular choice for consumers who prefer a natural sugar-like flavor in their foods and beverages.
Beyond sweetness, xylitol serves several functional roles in food formulation:
- Humectant: It retains moisture in baked goods, keeping them fresh and soft for longer periods.
- Bulking Agent: It provides the same volume and texture as sugar, making it ideal for replacing sucrose in cakes, cookies, and candies.
- Oral Health Agent: It inhibits the growth of Streptococcus mutans, the bacteria that cause tooth decay, and promotes remineralization of tooth enamel. This is why it’s a key ingredient in many sugar-free oral care products.
- Freeze Point Depressant: It lowers the freezing point of ice creams and frozen desserts, improving their texture and preventing ice crystal formation.
Official References
- Codex Alimentarius GSFA: Xylitol (INS 967) Approved Uses
- JECFA Evaluation: Xylitol Monograph
- FDA GRAS Status: Xylitol GRAS Notice
Disclaimer
The information provided in this article is for educational and informational purposes only and is not intended as medical advice. Consult a qualified healthcare provider before making any changes to your diet, especially if you have pre-existing medical conditions or are taking medications. The content is based on Codex Alimentarius standards and regulatory bodies like JECFA, FDA, and EFSA, but individual responses to food ingredients may vary. Xylitol is toxic to dogs; keep all xylitol-containing products out of reach of pets.