Sweeteners
Lactitol
Definition
What it is
Sugar alcohol: commonly found in 'sugar-free' products; can cause gas, bloating, and diarrhea at moderate doses; maltitol and sorbitol still raise blood glucose. Most sugar alcohols are high-FODMAP polyols (the 'P' in FODMAP); sorbitol and mannitol are the primary triggers, while xylitol, maltitol, isomalt, and lactitol all carry similar GI risk in sensitive individuals.
On the label
How it appears on labels
- lactitol
Regulation
Regulatory status
No bans or restrictions are recorded for this ingredient in the jurisdictions clearlabel tracks (US, EU, UK, Canada, Japan, Australia/NZ, Brazil).
Explainer
In plain language
Lactitol is a sugar alcohol used to sweeten and add bulk to sugar-free and reduced-sugar products. It is made from lactose, a sugar found in milk, and it tastes less sweet than table sugar while adding fewer calories. Like other polyols, it gives foods a sugar-like texture without ordinary sugar.
Assessment
Why it is flagged
Lactitol is authorized by the FDA and reviewed in the EU, and its main documented drawback is digestive rather than systemic. Because the body absorbs it poorly, it can ferment in the gut and is associated with gas, bloating, and a laxative effect at moderate to high doses, which is why many products carrying it print an excess-consumption notice. It is a high-FODMAP polyol, so people with IBS or sensitive digestion often react to smaller amounts than others do. Sensitivity varies a lot from person to person, and the amount in a single serving may be fine for one shopper and uncomfortable for another. Clear Label flags it so you can test how your own gut responds in your logs rather than guess.
In the aisle
Where it commonly shows up
- Sugar-free candies and chocolates
- Reduced-sugar baked goods and cookies
- Sugar-free chewing gum
- Low-sugar ice cream and frozen desserts
- Diabetic-marketed sweets
- Some meal-replacement and protein bars
Practical
Reading the label
It is listed by name as lactitol, usually grouped with other sweeteners. Products heavy in sugar alcohols often carry a line like 'excess consumption may have a laxative effect', which is a useful signal that a polyol is doing the sweetening.
Alternatives
If you want to avoid it
Some people who react to sugar alcohols choose products sweetened with stevia or monk fruit, or accept a small amount of real sugar instead. Comparing labels on similar products helps, since polyol content varies widely between brands.
FAQ
Common questions
Why does lactitol upset some people's stomachs?
It is poorly absorbed and ferments in the large intestine, which is associated with gas, bloating, and a laxative effect at higher doses. It is also a high-FODMAP polyol, so people with sensitive digestion may react to smaller amounts.
Does lactitol raise blood sugar?
Lactitol has a lower impact on blood glucose than table sugar, though sugar alcohols are not all equal and some do raise it modestly. People managing blood sugar often track their own response rather than assume zero effect.
Is lactitol safe for people who avoid lactose?
Lactitol is made from lactose but is chemically different from it. Individual tolerance varies, so this is a pattern worth testing in your own logs if dairy sugars usually bother you.
Citations
Sources
Citation
Primary reference
About this page: the definition, label names, severity, and regulatory chips come from the clearlabel ingredient taxonomy, the same data the scanner uses to score products. Research summaries describe associations reported in published studies, not diagnoses; individual responses vary. Scan any product with clearlabel to see which of its ingredients carry flags.