Are Sugar Alcohols Bad for You? What to Know Before You Eat Them

Sugar alcohols are not bad for most people in small amounts, but they are not free food either. Most still carry some calories, many cause bloating, gas or diarrhea when you eat too much, and they mostly show up in processed snacks. They raise blood sugar less than sugar, which can help diabetics. Moderation still applies.

What are sugar alcohols?

Sugar alcohols are sweeteners with names that usually end in “-itol”: erythritol, xylitol, sorbitol, maltitol and mannitol. They occur naturally in small amounts in some fruits, but most of what you eat is made in a factory and added to sugar-free gum, protein bars, low carb ice cream and “keto” snacks.

They are not alcohol in the drinking sense. The name comes from their chemical structure.

Do sugar alcohols have calories?

Yes, most do. They contain fewer calories than sugar because your body only partly absorbs them, but they are not zero. Erythritol is close to zero. Maltitol and sorbitol are about half to two thirds of sugar. People often treat a sugar-free bar as a free snack and end up eating two or three. The FDA has a plain overview of approved sweeteners if you want the full list.

Why do sugar alcohols upset your stomach?

Because you do not fully absorb them, they move into your large intestine, pull water in and get fermented by your gut bacteria. The result for a lot of people is bloating, gas, cramps or diarrhea, especially with sorbitol and maltitol (Makinen, 2016). How much you can handle varies a lot from person to person.

Are sugar alcohols good for diabetics?

They generally raise blood sugar and insulin less than regular sugar, which can help people managing diabetes. They still count toward carbs on some labels, so read the nutrition panel and check your own blood sugar response.

Is erythritol safe?

There is an open question here. A 2023 study linked higher blood levels of erythritol with a higher risk of heart attack and stroke and found it made blood platelets more likely to clot in lab tests (Witkowski et al., 2023). That study shows a link, not proof of harm, but it is one more reason not to build your diet around sweetened processed products.

What should I eat instead if I have a sweet tooth?

Whole foods are the best option. Berries, melon, oranges, grapes, frozen fruit with Greek yogurt and a square or two of dark chocolate all hit the spot with fiber and nutrients that sugar-free snacks do not have. If you do use products with sugar alcohols, treat them like any other treat: a planned portion, not an all-day snack.

For more on cleaning up snacks, read simple food swaps and eating more can help you lose more weight. If you want help building a plan you can stick to, take the XPL quiz.