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Sugar vs. Sugar Alcohol

Posted On : October 01, 2008


Sugar alcohols are carbohydrates which are also called “polyols.” Part of their chemical structure resembles sugar, and part of it resembles alcohol — hence the confusing name. Examples of common sugar alcohols are maltitol, sorbitol, isomalt, and xylitol.

Sugar alcohols occur naturally in plants. Some of them are extracted from plants (sorbitol from corn syrup and mannitol from seaweed), but they are mostly manufactured from sugars and starches.

Sugar alcohols are like sugar in some ways, but they are not completely absorbed by the body. Because of this, the blood sugar impact of sugar alcohols is less and they provide fewer calories per gram. Additionally, sugar alcohols don’t promote tooth decay as sugars do, so are often used to sweeten chewing gum. One, xylitol, actually inhibits bacterial growth in the mouth.

It’s important to note, however, that the different types of sugar alcohols act very differently in the body (see chart below).

Sugar Alcohol Calories/Gram Sweetness
to Sucrose
Sorbitol 2.6 50% to
Sugar-free hard and soft candies, chewing gum, flavored jam and jelly spreads, frozen foods, and baked goods
Mannitol 1.6 50% to
Chewing gum, hard and soft candies, flavored jam and jelly spreads, confections, and frostings
Xylitol 2.4 100% Chewing gum, hard candies, and pharmaceutical products
Erythritol 0.2 60% to
Confectionery and baked products, chewing gum, and some beverages
Isomalt 2.0 45% to
Hard and soft candies, ice cream, toffee, fudge, lollipops, wafers, and chewing gum
Lactitol 2.0 30% to
Chocolate, cookies and cakes, hard and soft candies, and frozen dairy desserts
3.0 25% to
Sugar-free foods and candies, and low-calorie foods
Maltitol 2.1 90% Sugar-free chocolate, hard candies, chewing gum, baked goods, and ice cream

The names of the individual sugar alcohols will be on the ingredient list of any product that contains them. They will be included in the amount of carbohydrate on the label, either in the total or on a separate line for sugar alcohols. If the product is labeled “sugar-free” or “no added sugar,” the manufacturer must show the sugar alcohol count separately. As I indicated above, sugar-free does not mean sugar alcohol free.

Though sugar alcohols have fewer calories than sugar, most of them aren’t as sweet, so more must be used to get the same sweetening effect. Still, there is a range of sweetness and impact on blood sugar among the sugar alcohols.


The presence of Sugar Alcohol is sugar free food is the dietary version of the Enron Accounting. The label may suggest there is no calories from Sugar, thus Sugar Free label, yet is contains calories from Sugar Alcohol. This is usually listed separately and usually in fine print. By Paying close attention to the ingredients of food purchased, patients can avoid some of the common problems that we see in the office. Inadequate weight loss, weight regain, gas , bloating etc.

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