Allulose and the FDA: Why This Sweetener Doesn't Count as Sugar (And What That Means for Your Body)

In 2019, the FDA (Food and Drug Association) made a decision it had never made before for any sweetener: it ruled that allulose - a naturally occurring rare sugar - could be excluded entirely from "total sugars" and "added sugars" on US nutrition labels. Not reduced. Not footnoted. Excluded. The allulose FDA classification created a category that had never existed before - a substance that is technically a sugar molecule but is treated by the body so differently that the FDA formally separated it from every other sugar on record. This post explains what allulose actually is, why the FDA classified it this way, what the science behind that decision looks like, and what it means practically for anyone trying to eat less sugar without eating less of what they love.

What Is Allulose? Starting From Scratch

The Basics: A Sugar That Exists in Nature but Barely

Allulose is a monosaccharide - a simple single-unit sugar - that occurs naturally in small quantities in figs, raisins, dried jackfruit, wheat, and certain caramel sauces produced during the Maillard reaction.

It is structurally almost identical to fructose - allulose is what chemists call a C-3 epimer of fructose, meaning the two molecules are mirror images of each other at a single carbon position. That one positional difference changes everything about how the body processes it - the enzymes that metabolise fructose cannot metabolise allulose efficiently.

Natural content in food is trace-level - a handful of raisins contains only milligrams. Commercial allulose is typically produced from fructose (derived from corn or sugar beet) via enzymatic conversion.

Is Allulose Natural or Artificial?

This is one of the most searched questions about allulose - and the answer requires nuance.

Allulose occurs in nature and is classified by regulatory bodies as a "rare sugar" - it is not synthesised from non-food compounds the way aspartame or sucralose are. Commercial production uses enzymatic bioconversion (not chemical synthesis), which is the same process used to produce many fermented and naturally-derived food ingredients.

The honest answer: allulose is natural in origin and in chemical structure - but commercially available allulose is manufactured at scale using enzymatic processing. That is not the same as "artificial," but it is not the same as "found in the wild" either. This is a distinction worth making clearly, because honest labelling is the entire point.

What's Worse: Sugar or Allulose?

Sugar is 50% fructose, which gets routed almost entirely to the liver, triggers de novo lipogenesis (the fat-synthesis pathway), raises blood glucose, spikes insulin, and at chronic daily volumes is a primary driver of NAFLD, insulin resistance, and visceral fat accumulation.

Allulose is absorbed into the bloodstream but not metabolised, produces no meaningful blood glucose or insulin response, and does not activate the liver's fat-synthesis pathway that fructose does. The FDA recognised this distinction formally in 2019, excluding allulose from "added sugars" on nutrition labels because it does not contribute to the health consequences that sugar does.

Sugar and allulose may look similar on paper but they are not even a close comparison in terms of biological cost - one fuels the chronic disease pipeline, the other exits the body largely intact.

What Does Allulose Taste Like?

Allulose is approximately 70% as sweet as table sugar, with a clean, neutral flavour profile - no significant bitter aftertaste, no cooling sensation (unlike erythritol), no liquorice-adjacent finish (unlike stevia).

In baking, allulose browns and caramelises similarly to sugar - one of the few sugar alternatives that does this - which makes it uniquely functional in cooked and baked applications. In beverages and cold applications, it dissolves well and behaves like sugar without the gritty texture sometimes associated with powdered erythritol.

When combined with monkfruit, as in BTS's formula, the result is a sweetener that matches sugar's sweetness intensity, texture, and behaviour across cooking applications - the combination exists specifically because each ingredient solves the other's limitation.

The FDA Decision: What It Actually Says and Why It Matters

What Did the FDA Actually Rule in 2019?

In April 2019, the US Food and Drug Administration issued a guidance document stating that allulose may be excluded from the declaration of "Total Sugars" and "Added Sugars" on the Nutrition Facts label, while still being required to appear in the total calorie count at 0.4 kcal/g (vs. sugar's 4 kcal/g).

The FDA's reasoning was explicit: allulose "has a different metabolic fate than other sugars" - it is absorbed but not metabolised in the way that sugars are, and its contribution to total caloric intake and blood glucose response is negligible enough to warrant separate treatment.

This was unprecedented. No other sugar or sugar-like substance had previously received this type of label exemption based on metabolic behaviour. The FDA essentially created a new category. For the consumer: a product containing allulose can truthfully carry "0g added sugars" on its label, even though it contains a substance that is technically a sugar molecule. This is regulatory recognition of metabolic reality.

What Does GRAS Status Mean and Does Allulose Have It?

GRAS stands for Generally Recognized as Safe - the FDA's designation for substances with adequate evidence of safety under conditions of intended use, either through scientific review or a long history of common use in food.

Allulose received GRAS status via the FDA's voluntary GRAS notification pathway in 2012, with subsequent notices accepted through 2019 confirming safety for broader use. GRAS does not mean "tested at any dose" - it means safe at the levels typically consumed in food. For allulose, the relevant human trials found no adverse effects at doses up to 0.5g per kg of body weight - roughly 35g for a 70kg adult - in single-dose settings.

Unlike many sweeteners that received GRAS status through industry self-affirmation, allulose's classification came with a specific mechanistic rationale from the FDA itself - not just industry safety submissions.

Why the "Added Sugars" Exclusion Is Significant Beyond the Label

The 2019 guidance is not just a labelling technicality - it reflects the FDA acknowledging, in writing, that allulose does not behave metabolically like sugar. "Added sugars" on a nutrition label matter because they are the number the WHO, AHA, and most dietary guidelines use to define sugar overconsumption. By excluding allulose, the FDA is saying: this substance does not contribute to the problem that the "added sugars" line was created to track.

This is the regulatory equivalent of the FDA drawing a clear line between allulose and sugar - a line that most commercial sweetener brands do not highlight because they are selling products that sit on the wrong side of it.

How to Read a Food Label and Spot Hidden Sugar →

What About India and Other Regulatory Bodies?

United States
The most comprehensive regulatory endorsement allulose has received anywhere in the world. FDA granted GRAS status in 2012 and in April 2019 issued a landmark guidance ruling that allulose could be excluded entirely from "Total Sugars" and "Added Sugars" on nutrition labels, citing its distinct metabolic fate. No other sugar or sugar-like substance has received this treatment before or since.

Japan
The longest and most extensive real-world safety record allulose has anywhere. Japan has used allulose commercially under the name D-psicose since the early 2000s, with over 25 years of unrestricted consumption and no adverse effects flagged at a population level. The foundational science behind allulose came almost entirely from Japan's Rare Sugars Project at Kagawa University.

South Korea
Approved allulose as a food ingredient and permits its use in commercial food products, with regulatory recognition aligned broadly with the FDA and Japanese frameworks.

Mexico
Approved for use as a food ingredient, with allulose-containing products commercially available and labelled under local food authority guidelines.

Canada
Health Canada permits allulose in food products under existing frameworks for rare sugars, though a specific novel food approval equivalent to the US GRAS pathway has not been issued as a standalone ruling.

Australia & New Zealand
FSANZ permits allulose under existing provisions for novel foods at the discretion of manufacturers, without a dedicated specific approval standard as of this writing.

European Union
The most restrictive major market. Allulose is classified as a novel food under EU Regulation 2015/2283 and requires full EFSA safety authorisation before commercial use. As of 2024, the EFSA review process is ongoing and full approval has not been granted.

India
FSSAI does not yet have a dedicated approved category for allulose. It is not listed as a prohibited or restricted substance, but the absence of a specific approval framework means its commercial use sits in a regulatory grey zone that is still evolving. BTS maintains full transparency on where the product stands under applicable FSSAI frameworks at time of purchase.

The Science Behind the Classification: How Allulose Actually Behaves in the Body

Absorption Without Metabolism: The Key Mechanism

Approximately 80-90% of ingested allulose is absorbed from the small intestine into the bloodstream - so it does enter the body. The distinction is what happens next: allulose is not phosphorylated effectively by the enzymes that metabolise fructose and glucose, meaning it cannot enter the normal carbohydrate metabolic pathways.

Instead, it circulates briefly in the bloodstream and is excreted largely intact in urine - without being converted to energy, stored as glycogen, or converted to fat through de novo lipogenesis. This is the precise metabolic mechanism the FDA cited in its 2019 guidance as the basis for excluding allulose from the added sugars calculation.

Blood Sugar and Insulin: What the Research Shows

Multiple human clinical trials have found that allulose consumption does not significantly raise postprandial (post-meal) blood glucose or insulin levels. Hayashi et al. (2010) found single-dose allulose consumption produced no significant blood glucose or insulin response in healthy adults at doses up to 7.5g. Iida et al. (2008) found that allulose given with a sucrose load measurably reduced the blood glucose spike caused by the sucrose - suggesting allulose may have an active glucose-moderating effect, not just a neutral one.

For people managing type 2 diabetes, pre-diabetes, or insulin resistance, this is clinically significant - the sweetener does not add to the glycemic load and may reduce it.

Monkfruit and Allulose for Diabetics →

Does Allulose Affect the Liver?

Unlike fructose - which is processed almost entirely by the liver and drives hepatic fat synthesis - allulose bypasses this pathway. Animal studies (primarily rodent models) have found that allulose supplementation actually reduced visceral fat accumulation and hepatic fat content compared to control groups - suggesting an active anti-obesity and hepatoprotective effect.

The mechanism appears to involve inhibition of fatty acid synthase (FAS) - an enzyme involved in de novo lipogenesis - meaning allulose may block the very pathway that fructose activates. Human trial evidence on hepatic effects specifically is still emerging and should be understood as promising but not yet conclusively established in large-scale human studies.

Allulose and Gut Health: What You Need to Know About Digestive Tolerance

The fraction of allulose not absorbed in the small intestine (roughly 10-20%) reaches the large intestine, where it may be fermented by gut bacteria. At typical consumption levels (under 10-15g per serving), this is well-tolerated by most people - no significant bloating, gas, or laxative effects in clinical settings.

At higher doses (15-30g in a single sitting), some individuals experience GI discomfort similar to what fibre overconsumption produces - loose stool, mild cramping - because of the fermentation load. Unlike erythritol, which is mostly excreted intact and causes osmotic GI effects, allulose's tolerance issue is fermentation-based and dose-dependent - it improves with gradual introduction.

Practical guidance: start with smaller amounts, increase gradually, and note that individual tolerance varies based on gut microbiome composition.

Allulose vs. Every Other Sweetener: Where It Actually Sits

Allulose vs. Sugar: The Direct Comparison

Allulose vs. Erythritol: The Comparison People Actually Need

Erythritol is a sugar alcohol; allulose is a rare monosaccharide - they are chemically distinct and behave differently. Erythritol: ~0.2 kcal/g, 0 GI, mostly excreted intact but causes osmotic GI effects in many people (diarrhoea, bloating) at doses over ~15g, has a distinct cooling sensation on the palate, and does not caramelise. Allulose: ~0.2-0.4 kcal/g (negligible), 0 GI, does caramelise, minimal cooling effect, lower GI disturbance threshold at equivalent doses.

The significant recent differentiator: Hazen et al. (Cleveland Clinic, 2023, Nature Medicine) found elevated plasma erythritol associated with increased platelet aggregation and cardiovascular event risk. The research is preliminary but the signal has been noted in mainstream medicine - allulose does not carry this flag.

Bottom line: if you're choosing between erythritol and allulose, the current evidence profile favours allulose on both GI tolerance and cardiovascular risk signal.

Allulose vs. Stevia vs. Monkfruit: Functional Roles

These three are not interchangeable - they are functionally different tools that solve different sweetener problems.

Stevia: high-intensity sweetener (~200-400x sugar), zero calories, zero GI, but carries a noticeable bitter aftertaste in many people due to rebaudioside compounds and the TAS2R38 genetic receptor - not suitable as a 1:1 sugar replacement in bulk applications.

Monkfruit: high-intensity sweetener (~150-250x sugar), zero calories, zero GI, cleaner flavour profile than stevia in most users, no metabolic burden, mogrosides have demonstrated anti-inflammatory properties - but also not a 1:1 bulk substitute.

Allulose: moderate sweetness (~70% of sugar), near-zero calories, zero GI, can be used in near-equivalent volumes to sugar, caramelises, browns, provides mouthfeel and texture - fills the bulk and functional role sugar plays in food.

Why BTS combines monkfruit and allulose: monkfruit delivers the intensity so less allulose is needed; allulose delivers the bulk, texture, and cooking behaviour. Together, they replicate the full functional profile of sugar. Separately, neither does.

Which Is Safer: Stevia or Allulose?

Both stevia and allulose are considered safe for human consumption and carry FDA GRAS status - but "safe" is doing a lot of work in that sentence, and the two sweeteners earn it through completely different mechanisms. Stevia's safety profile comes from centuries of traditional use in South America and a reasonably robust body of modern research on its primary compounds, rebaudiosides. At normal dietary doses, pure high-quality stevia extract does not raise blood glucose, does not accumulate in the body, and passes through without meaningful metabolic activity. The concern with stevia is not acute toxicity, it's chronic use data, particularly around gut microbiome impact. A 2021 study published in Molecules found that steviol glycosides may inhibit certain beneficial bacterial strains in the gut at concentrations achievable through regular consumption. The evidence is not conclusive, and the effect appears dose-dependent, but it's a flag worth knowing about.

Allulose's safety case is different and, from a metabolic standpoint, arguably stronger. The FDA's 2019 decision to exclude allulose from "added sugars" and "total sugars" wasn't a favour to the industry - it was the agency formally acknowledging that allulose has a fundamentally different metabolic fate than sugar. Roughly 80-90% is absorbed into the bloodstream and excreted in urine without being metabolised. It doesn't activate de novo lipogenesis, doesn't raise postprandial blood glucose, doesn't spike insulin, and doesn't generate uric acid. Multiple human clinical trials - Hayashi et al. (2010), Iida et al. (2008) - confirmed no significant glycemic or insulinemic response at doses up to 7.5g and beyond. On the safety question specifically, allulose has no equivalent of stevia's gut microbiome concern in the current literature, and unlike erythritol, it carries no cardiovascular flag from the 2023 Cleveland Clinic research. Its only documented downside is GI discomfort at high single-dose consumption over 15-20g at once due to fermentation of the unabsorbed fraction in the large intestine. That's a dose issue, not a safety issue.

Where stevia has a practical edge is purity and simplicity - if you're buying a genuinely clean, high-rebaudioside-A extract with no fillers, the ingredient you're consuming is a well-characterised plant compound with a long history of use. The problem is that almost no commercial stevia product is that clean. Most "stevia" sweeteners on shelves are stevia blended with erythritol, maltodextrin, or dextrose - and the erythritol component now carries a legitimate cardiovascular risk question mark following the Hazen et al. study.

The honest summary: both are safe at normal doses by current evidence. Allulose has a mechanistically cleaner metabolic profile - it is genuinely inert in the body in a way stevia is not quite, and it has explicit regulatory recognition of that metabolic inertness. For someone choosing between the two as a daily sugar replacement, allulose is the more defensible choice in current science. The best-in-class option is using both monkfruit and allulose together: monkfruit handles the intensity with a cleaner safety profile than stevia, allulose handles the bulk and function, and neither brings the baggage.

Full Sweetener Comparison

*Negligible in use due to intensity

How to Use Allulose: Practical Guide for Cooking, Baking and Daily Use

Allulose as a 1:1 Sugar Substitute: When It Works and When to Adjust

Allulose is one of the only sugar alternatives that can be used in near-equivalent volume to sugar in most applications - typically 1.25-1.3 cups allulose per cup of sugar to compensate for its slightly lower sweetness (70% of sugar).

Allulose in Baking: What It Does That Other Sweeteners Can't

Allulose undergoes the Maillard reaction - the browning process responsible for baked goods' colour, crust, and flavour complexity - which stevia and erythritol do not. It caramelises, which means it works in applications like toffee, caramel sauce, and creme brulee where other sugar alternatives fail entirely.

One caution: allulose browns more rapidly than sugar at high temperatures - reduce oven temperature by 10-15°C and monitor closely in recipes above 180°C. It produces a moist, tender crumb in cakes and muffins because it retains moisture like sugar - unlike erythritol, which can produce a dry, gritty texture on cooling.

Allulose in Drinks, Cold Applications, and Everyday Use

Dissolves cleanly in both hot and cold liquids - no grittiness, no sedimentation. In coffee and chai, it provides clean sweetness without aftertaste - the combination of monkfruit and allulose in BTS means you use a smaller total volume while getting full sweetness.

In cold desserts (ice cream, sorbet): allulose reduces the freezing point of mixtures, producing a softer scoop that stays scoopable from the freezer - a functional advantage sugar alternatives normally don't offer.

Frequently Asked Questions

How much allulose is too much in a day?

Most research points to around 0.4-0.5g per kg of body weight as the comfortable daily ceiling, which works out to roughly 30-35g for an average 70kg adult. Below that threshold, allulose is well tolerated with no significant GI issues for most people. Push past 15-20g in a single sitting and some people experience mild bloating or loose stool - not because allulose is harmful but because the unabsorbed fraction gets fermented in the large intestine, the same effect as eating too much fibre at once. Spread across the day in normal food and drink use, hitting a problematic dose is genuinely difficult unless you're aggressively baking with it at every meal.

Is allulose safe for diabetics?

Yes - allulose is one of the most diabetes-appropriate sweeteners currently available. Multiple human clinical trials have found it does not raise postprandial blood glucose or insulin levels, and at least one study found it actively reduced the blood sugar spike caused by consuming it alongside sucrose. People managing type 2 diabetes, pre-diabetes, or insulin resistance can use allulose without it contributing to glycemic load. As always, individual responses vary and anyone managing a metabolic condition should monitor their own glucose response.

Does allulose cause digestive problems?

At typical serving sizes (under 10-12g), most people tolerate allulose well with no significant GI effects. At higher doses (over 15-20g in a single sitting), some people experience mild bloating or loose stool due to fermentation of unabsorbed allulose in the large intestine - similar to the effect of eating too much fibre at once. Unlike erythritol's osmotic laxative effect, this is dose-dependent and generally improves as the gut adapts. Starting with smaller amounts and increasing gradually reduces the likelihood of any discomfort.

Is allulose approved and available in India?

As of this writing, allulose does not have a dedicated FSSAI-approved category in India, but it is not classified as a prohibited or restricted substance. Regulatory frameworks for novel rare sugars are still developing globally. BTS's products containing allulose are formulated within applicable Indian food safety regulations.

Is allulose hard on the liver?

No - allulose is actually one of the most liver-friendly sweeteners you can use. Unlike fructose, which gets routed almost entirely to the liver and triggers de novo lipogenesis (the fat-synthesis pathway that drives NAFLD), allulose bypasses that pathway completely. It's absorbed into the bloodstream but not metabolised, excreted in urine intact, without placing any meaningful burden on the liver.

Animal studies have even found it reduces hepatic fat accumulation by inhibiting fatty acid synthase, the same enzyme fructose activates, meaning it may actively work against liver fat rather than contribute to it. That's precisely why the FDA excluded it from "added sugars" in 2019 - with the same molecular shape as fructose, a completely different fate in the body.

The Bottom Line

The FDA just told you allulose isn't sugar. Not technically. Not metabolically. Not on your label.

Most brands heard that and thought: great, we can call our product "zero sugar" and move on. We heard it and thought: this is the ingredient we've been waiting for.

BTS uses monkfruit and allulose because one gives you the sweetness and the other gives you the texture, the caramel, the bake - everything sugar promised you but delivered with a side of liver damage.

No compromise. On taste. On health. On honesty.

Try Beyond The Sugar - the sweetener the FDA had to invent a new category for →