No, it is not. Allulose is a sugar, an actual monosaccharide, the same size and shape of molecule as glucose or fructose. Sugar alcohols like erythritol, xylitol, sorbitol and maltitol are a different class of compound entirely, and the digestive complaints people have about them come from a mechanism that does not apply to allulose in the same way.
That distinction matters more than a chemistry footnote should, because sugar alcohols are the reason a lot of people have given up on sugar-free baking altogether. If one bad experience with a sugar-free candy bar wrote off the entire category for you, allulose is the ingredient worth a second look. Our sugar-free marshmallows exist because of it, and no other sweetener we tried would set properly.
The chemistry, briefly
Allulose, also sold as D-allulose or psicose, is what food scientists call a rare sugar. It occurs in nature but only in tiny amounts, in figs, raisins, jackfruit, wheat and maple syrup.
Structurally it is almost fructose. The two molecules have the same atoms in the same quantities and differ only in how one hydroxyl group is oriented at a single carbon. That is the whole difference, and it is enough to change what your body does with it.
Sugar alcohols are a separate build. Take a sugar and chemically reduce its carbonyl group and you get a polyol, which is the "alcohol" in sugar alcohol. Erythritol comes from glucose that way. The name confuses people constantly, and it has nothing to do with drinking alcohol.
What your body does with it
The short version: allulose gets absorbed, then leaves.
Most of what you eat is taken up in the small intestine using the same transporter that handles fructose. Once absorbed, your body has no good pathway to break it down for energy, so it passes through the kidneys and out in urine largely intact. It arrives, it sits there unused, and it leaves.
That is why the FDA allows it to be counted at a small fraction of the calories of sugar, around a tenth per gram, and why in 2019 the FDA said allulose can be left out of the "total sugars" and "added sugars" lines on a Nutrition Facts panel. It still counts in total carbohydrate. This is a real quirk to know when you are reading a label: a product can honestly say zero added sugars while containing a spoonful of something that is chemically a sugar.
Why the sugar alcohol complaint does not transfer
The mechanisms sit side by side and the difference is the whole point.
Most sugar alcohols are absorbed poorly. A large share of what you eat travels intact into the large intestine, where your gut bacteria treat it as food and ferment it. Fermentation makes gas. The larger polyols, maltitol especially, also pull water into the bowel. Gas plus water is the bloating, the cramping and the urgent trip people associate with sugar-free products.
Allulose is absorbed in the small intestine before it ever gets there, so much less of it arrives at the bacteria that would cause the trouble. Erythritol, to be fair, is also absorbed reasonably well and is by far the gentlest of the polyols, which is why it dominates the shelf. Allulose sits a step further along in the same direction.
The honest caveat, and it is a real one: this is a matter of degree, not a guarantee. Absorption is not total, and the amount your small intestine can handle at once has a ceiling. Eat a large quantity in one sitting, particularly in a drink where it hits fast, and some people get bloating or a laxative effect anyway. Tolerance is individual and it climbs with regular exposure.
So the sensible approach is to introduce it the way you would introduce any new fiber. Start with a normal serving of one dessert, see how you feel, and go from there rather than making a full pan of something and finding out the hard way. If you have a diagnosed gut condition or you are managing blood sugar under medical supervision, ask your doctor about allulose rather than taking a recipe site's word for it. I test desserts for a living, not patients, and none of this is medical advice.
What it does in a kitchen that no other sugar substitute does
This is the part that convinces people, because the differences are not subtle once you have cooked with it.
It browns. Allulose is a reducing sugar with a free carbonyl group, which means it will run the Maillard reaction and caramelize. Erythritol, monk fruit and stevia will not do this at any temperature. If you have ever pulled a pale, anemic-looking sugar-free cake out of the oven, this is why. Our healthier toffee works because allulose browns and thickens in the pan almost exactly the way sugar does.
It stays dissolved. Erythritol recrystallizes as things cool, which turns soft desserts gritty and turns a marshmallow into something dense and sandy. Allulose behaves like a sugar syrup and stays in solution, which is the entire reason our marshmallows come out pillowy and our low-cal lemon bars set into a smooth curd instead of a grainy one.
It holds moisture. Allulose is hygroscopic, so it keeps baked goods soft the way sugar does. Cookies stay chewy on day three instead of turning into biscuits.
It behaves in the freezer. Allulose lowers the freezing point of a mixture, which keeps ice cream scoopable rather than setting into a solid brick, and it does not go sandy the way erythritol tends to.
It has no cooling effect. Erythritol absorbs heat from your mouth as it dissolves, which produces that faint mint sensation people find so strange in sugar-free frosting. Allulose does not do this.
The honest drawbacks
It is not the answer to everything, and pretending it is would be exactly the kind of overselling this site exists to avoid.
It browns fast, which is a problem as often as it is a gift. A recipe converted straight to allulose can be dark on the outside before it is done in the middle. Drop the oven temperature by 25 degrees Fahrenheit or pull it earlier, and watch it rather than trusting the timer.
It is roughly 70 percent as sweet as sugar, so a straight one-to-one swap tastes slightly flat. Most people add a little more, or add a pinch of monk fruit or stevia extract to cover the gap without adding bulk.
It costs more than erythritol, usually by a good margin, which is a real constraint if you bake often.
Things made with it are a little softer and keep a little less well, because it holds onto moisture. Our marshmallows are at their best inside a week rather than sitting on a counter for a month.
And it is not approved as a food ingredient everywhere in the world. It is widely available in the United States and simple enough to buy. If you are reading this elsewhere, check what is legal and sold where you are before you go looking.
Where to start with it
If sugar alcohols are the specific thing that has ruled sugar-free desserts out for you, the useful test is a recipe where allulose is doing structural work rather than just adding sweetness, because that is where you actually taste and feel the difference. The marshmallows are the clearest example we have. The lemon bars are the easier one.
If you would rather sidestep the whole question, plenty of desserts get there on fruit and dairy alone. Our no added sugar roundup collects twenty of them with the real macros printed, and there is a free sampler at the bottom of this page if you want a few to start with.
Two companion posts if you are working this out properly: the honest read on erythritol, including the cardiovascular research and why it tastes cold, and a job-by-job guide to which sweetener to reach for when you are standing in front of a mixing bowl.
