Monk Fruit vs Stevia vs Allulose: What the Labels Say
The short answer: monk fruit, stevia and allulose are three different sweeteners, and the label treats them in three different ways. Monk fruit and stevia sweeteners are extracts that the FDA lists as high-intensity sweeteners with GRAS notices, while allulose is a sugar that the FDA lets brands leave out of the Total Sugars and Added Sugars lines. In a bag sold to measure like sugar, the extract can be a small part of what you buy. This explainer shows what the ingredient line, the Nutrition Facts panel and the FDA pages actually say, using one product we carry as the worked example.
Three sweeteners, three label routes
The FDA’s page on aspartame and other sweeteners in food sorts sugar substitutes into groups. Monk fruit and stevia sit in one group, sugar alcohols such as erythritol in another, and allulose falls under a separate FDA guidance. Here is how each one is described there:
- Monk fruit. The FDA calls it Siraitia grosvenorii Swingle fruit extract (SGFE), commonly known as Luo Han Guo or monk fruit, and says it is reported to be 100 to 250 times sweeter than sugar, depending on its mogroside content. The FDA says it has evaluated GRAS notices for SGFE and has not questioned the notifiers’ GRAS conclusions under the intended conditions of use.
- Stevia. What the FDA covers is high-purity steviol glycosides (95% minimum purity) from the leaves of the stevia plant or from fermentation, such as Rebaudioside A (Reb A). It says these are reported to be 200 to 400 times sweeter than sugar, and that it has not questioned the GRAS conclusions in the notices for them. The same page says stevia leaf and crude stevia extracts are not considered GRAS and are not permitted for import as sweeteners.
- Allulose. A sugar, not an extract. The FDA’s 2020 guidance on declaring allulose covers how it appears on the panel, which we explain below.
“GRAS” stands for generally recognized as safe. A GRAS notice is filed by a company for a specific substance and use, and the FDA’s reply says whether it has questions. That is the exact status the FDA describes for these two extracts, and we do not stretch it further.
What the ingredient line really contains
Because monk fruit and stevia extracts are so much sweeter than sugar, a spoonful of pure extract would be far too strong to swap into a recipe. Products sold to measure “1:1 like sugar” pair the extract with a bulking ingredient that gives the volume. Ingredients are listed in order of weight, so the first word on the line tells you what most of the bag is.
Our worked example is Lakanto Classic Monk Fruit Sweetener with Erythritol. The ingredient line reads “Erythritol, monk fruit extract.” The Lakanto product page says the erythritol “provides the texture, volume, and baking performance of sugar”, and the monk fruit extract supplies sweetness. So the bag is mostly erythritol by weight, even though monk fruit is the name on the front.
That pattern is worth checking on any monk fruit or stevia product. The carrier might be erythritol, another sugar alcohol, dextrose, or allulose, and each one shows up differently on the panel. Lakanto itself sells an erythritol blend and a separate allulose blend, so even one brand’s “monk fruit sweetener” can mean two different labels. Read the ingredient line before you compare the panels.
Sugar-for-sugar wording
Lakanto says its Classic sweetener “measures 1:1 like sugar” and tells you to “use the same amount your recipe calls for.” That is a measuring claim from the maker about volume in recipes. It is not a nutrition term defined on the panel, and the FDA’s sweetness figures above refer to the pure extracts, not to a blended bag. If you swap one brand’s 1:1 product for another’s, check the directions on each package, since the carrier changes from brand to brand.
What the Nutrition Facts panel shows
These lines come from the Lakanto Classic panel as shown on Vitacost’s listing for the 16 oz bag:
| Panel line | Lakanto Classic, per 2 tsp (8 g) |
|---|---|
| Servings per container | About 57 |
| Calories | 0 |
| Total fat | 0 g |
| Sodium | 0 mg |
| Total carbohydrate | 8 g (3% DV) |
| Sugar alcohol | 8 g |
| Protein | 0 g |
The panel adds that the product is not a significant source of total sugars, added sugars or dietary fiber, among other nutrients. Two things stand out. First, the 8 g of total carbohydrate per serving is all sugar alcohol, which matches an ingredient line led by erythritol. Second, the panel still prints a Total Carbohydrate figure; the sugar alcohol sits inside it as a sub-line, not outside it.
The retailer listing also carries a footnote that reads “Net Carbs: Subtract Fiber and Sugar Alcohols from Total Carbohydrates per Serving.” That is the brand’s method, not an FDA term. Our net carbs vs total carbs explainer covers why that sum varies between brands and when the Sugar Alcohol line has to be printed.
How allulose shows on the panel
Allulose follows its own rule. The FDA’s October 2020 guidance says the agency intends to exercise enforcement discretion for the exclusion of allulose from the amount of “Total Sugars” and “Added Sugars” declared on the label, and for the use of 0.4 calories per gram when brands calculate Calories, pending a rulemaking. The guidance names those two sugar lines; it does not list Total Carbohydrate among the exclusions, so allulose grams still count there.
In practice, a product sweetened with allulose may show a Total Carbohydrate figure that is higher than its sugars lines suggest. The panel does not give allulose its own line the way it can for sugar alcohol, so the ingredient line is where you learn it is there. Our guide on how to read a Nutrition Facts label explains how the Total Sugars and Added Sugars lines work for other foods. For an allulose-sweetened electrolyte stick read next to a stevia-only one, see our LMNT vs Liquid I.V. Sugar-Free labels comparison. For a sugar the panel does count as added, our raw honey vs regular honey labels guide shows how a single-ingredient honey prints that line.
Monk fruit vs stevia vs allulose at a glance
| Monk fruit extract | Stevia (steviol glycosides) | Allulose | |
|---|---|---|---|
| What it is (per FDA) | Fruit extract (SGFE) | High-purity leaf or fermentation extract | A sugar |
| Sweetness vs sugar (per FDA) | 100 to 250 times | 200 to 400 times | Not stated on the pages we used |
| FDA status we can cite | GRAS notices, no questions from FDA | GRAS notices for high-purity forms, no questions from FDA; leaf and crude extracts not permitted as sweeteners | Labeling guidance (2020) |
| Where it shows on the panel | Depends on the carrier | Depends on the carrier | In Total Carbohydrate; excluded from Total and Added Sugars |
A note on erythritol
Erythritol is the carrier in our example, so it matters here. The FDA’s sweetener page lists it among the sugar alcohols it permits as sugar substitutes, alongside sorbitol, xylitol and others. We do not make any claim about its effects in either direction; we only report that it is the first ingredient on this bag and the source of the 8 g Sugar Alcohol line.
Where these show up on our site
You will see monk fruit and stevia most often in the ingredient lines of flavored protein powders. Our whey protein powder label explainer lists which of those products use each one.
Quick checklist
- Read the first ingredient to find the carrier.
- Check for a Sugar Alcohol line when the carrier is erythritol or another sugar alcohol.
- For allulose, compare Total Carbohydrate with the sugars lines.
- Treat “1:1” and net carb figures as the maker’s wording.
- Talk to your doctor or pharmacist if you have a health condition or take medication and are unsure whether a sweetener suits you.
FAQ
Is monk fruit sweetener just monk fruit?
Not usually in bags made to measure like sugar. Lakanto Classic lists erythritol first and monk fruit extract second, so most of the bag by weight is erythritol.
Is stevia leaf allowed as a sweetener in the U.S.?
The FDA says stevia leaf and crude stevia extracts are not considered GRAS and are not permitted for import as sweeteners. Its GRAS notices cover high-purity steviol glycosides.
Why does an allulose product show carbs but low sugars?
Under the FDA’s 2020 guidance, brands may leave allulose out of Total Sugars and Added Sugars. It still counts in Total Carbohydrate.
Why is the calorie line 0 on a monk fruit and erythritol blend?
That is what the Lakanto panel prints per 2 tsp serving. Lakanto says erythritol has zero calories.