Sugar alcohols are useful ingredients for replacing sugar, but they are not all the same substance. Erythritol, maltitol, xylitol and sorbitol differ in sweetness, energy and digestion. Judge the specific ingredient and amount. Putting them in one group does not make every result interchangeable.
The alcohol in the name does not mean the alcohol in beer or spirits. It refers to chemical structure. Your protein bar has not secretly developed a nightlife.
Sugar alcohols explained without grouping them together
Erythritol is largely absorbed and excreted with little use for energy. Maltitol and xylitol follow different digestive paths and provide more usable energy. Their effects on blood glucose and the gut therefore differ. [1]
Maltitol is relatively close to sugar in sweetness. Xylitol is also quite sweet, while erythritol is less sweet by weight. Recipes also combine them with other sweeteners for the desired taste and texture.
That means “contains polyols” is only the beginning of the information you need. Look for the specific names in the ingredient list.
Calories depend on the label system too
For Indian labels, the cited FSSAI rules use two calories per gram for polyols other than erythritol, and zero for erythritol. [2]
Those are labelling factors. Ingredient specific energy figures in research and labels from other countries follow different conventions. Do not assume one country's number applies everywhere.
The total calories on a bar still include energy from its other ingredients. A sugar alcohol sweetened chocolate coating can also contain substantial fat.
Why some polyols upset the gut
Some polyols are incompletely absorbed. Material remaining in the intestine can draw in water, and microbes ferment some of it. This can contribute to gas, bloating or loose stools. [1]
Effects depend on the type, amount and person. Your friend's comfortable serving does not establish your tolerance. Several products in one day can also add up, including bars, sweets and drinks.
Erythritol's handling differs from that of many other polyols, but that is not a promise of unlimited digestive comfort or a complete long term safety verdict.
Avoid blanket safety conclusions
A digestive tolerance study does not answer every question about long term health. Equally, an observational link between a blood marker and disease does not prove that eating a normal serving caused the outcome.
Keep the claim matched to the evidence. This article explains uses and digestive trade offs. It does not label every polyol safe in any amount or harmful in every serving.
For a specific product, follow its label directions and warnings. If you have a condition affecting food choices, use individual medical guidance rather than a generic sweetener ranking.
How to choose a bar with polyols
Try one serving before buying a large box. If you are sensitive, assess tolerance with a smaller serving rather than starting with a large dose. Do not test several new sweetened products at once.
Check the fibre ingredients too because they can affect the same symptoms. Our gas and bloating guide explains why checking the full recipe matters before blaming protein.
Judge sugar alcohols by the specific ingredient, amount and finished recipe. Replacing sugar is a practical formulation choice. Good use still means sensible portions and honest calorie information. The ingredient name is neither a danger sign nor permission to ignore your gut.