Low-carb sweeteners: what is truly usable today and what is still under evaluation

In recent years, interest in low-calorie, sugar-free, or reduced-glycemic-impact sweeteners has grown significantly.

It’s an understandable trend: those following a low-carb or ketogenic diet often look for sugar alternatives that allow them to reduce carbohydrates without completely giving up sweet tastes.

But there’s an important point that is often overlooked.

In the world of sweeteners, it’s not enough to ask if an ingredient is “natural,” “innovative,” or “promising.” You also need to ask:

• Is it authorized in the European Union?
• Is it suitable for the intended food use?
• Does it actually work in baking?
• Does it have a pleasant taste?
• Does it have undesirable effects if consumed in large quantities?
• Is it compatible with a quality low-carb product?

Because in low-carb, it’s not just about removing carbohydrates. It’s also about what you put in their place.

In this article, we look at some new-generation sweeteners, along with some sweeteners already on the European market, distinguishing between what is already concretely usable and what is still under evaluation.

---

A necessary premise: USA and Europe are not the same thing

When talking about new sweeteners, many articles cite the American market. This is normal: the United States often leads in the commercial introduction of new ingredients.

However, for those who produce or sell food in Italy and the European Union, the decisive point is different: the ingredient must be authorized according to European regulations.

A sweetener may be considered usable in the United States and not yet in Europe. Or it may only be allowed in certain forms, concentrations, or product categories.

For this reason, it is important to always distinguish between:

• FDA evaluation in the United States;
• EFSA authorization and EU regulations;
• Actual commercial availability;
• Permitted use in a specific food.

This distinction is crucial to avoid confusion.

---

Allulose: very interesting, but not yet authorized in Europe

Allulose, also known as D-psicose, is one of the most discussed ingredients in the world of low-carb sweeteners.

From a chemical point of view, it is a rare monosaccharide, naturally present in small quantities in some foods. It has a taste very similar to sugar and a very low caloric intake compared to sucrose.

In the United States, it has attracted great attention because it can be used in various confectionery products and benefits from specific labeling treatment. This has made it very interesting for companies that want to reduce sugars and calories while maintaining a sensory yield similar to sugar.

Why it interests the low-carb world

Allulose has several interesting aspects:

• It has a taste closer to sugar than many intense sweeteners;
• It does not have the classic metallic or bitter aftertaste of some alternatives;
• It can contribute to the browning and structure of some products;
• It has a very low caloric intake;
• It does not behave like a normal metabolizable sugar.

For these reasons, it is often cited as one of the most promising sweeteners for low-carb and keto products.

The critical point: the European situation

In Europe, however, allulose is not currently authorized as a novel food.

In 2025, EFSA evaluated D-allulose as a novel food but concluded that, based on the available data, its safety cannot be established.

This does not automatically mean that allulose is dangerous. It means, however, that, at present, there is insufficient data for a positive evaluation by the European authority.

For an Italian consumer or a food brand operating in the European Union, this is the central point: allulose is an interesting ingredient to follow, but it should not be presented as a solution already available and freely usable in European food products.

Does it really work in baking?

Another point to clarify concerns fermentation.

Sometimes allulose is described as an alternative sugar also suitable for leavened products. But caution is needed: allulose does not behave like sucrose, glucose, or other sugars fermentable by baker's yeast.

In a baked product, therefore, it is not enough to replace sugar with allulose and expect the same dough behavior.

For those working with low-carb baked goods, this detail is important: a sweetener may have a good taste, but not necessarily give structure, fermentation, volume, or browning in the same way as traditional sugar.

---

Monk fruit: natural does not automatically mean authorized

Monk fruit, or luo han guo, comes from the plant Siraitia grosvenorii, native to Asia. Its sweetness is mainly due to mogrosides, compounds with a sweetening power much higher than sugar.

In the United States, monk fruit is already present in many products, often mixed with erythritol or other bulking agents. It is appreciated because it has negligible caloric intake and does not affect the glycemic load like sugar.

Why it interests low-carb

Monk fruit is interesting because:

• It has a very high sweetening power;
• It can be used in very small quantities;
• It is not a traditional sugar;
• It can be useful in mixtures with other sweeteners;
• It has a perceived "more natural" image compared to some synthetic sweeteners.

However, here too the decisive point is regulation.

The situation in Europe is more complex than it seems

In Europe, a distinction must be made between different forms of monk fruit.

Some non-selective preparations may have a different classification from purified and concentrated extracts. However, this does not mean that high-concentration mogroside extracts are automatically authorized as food sweeteners.

Purified extracts, i.e., those used as intense sweeteners, fall within a specific regulatory framework and are still under evaluation.

So the phrase "monk fruit is natural" is not enough.

For a food product sold in Italy, it is necessary to know exactly:

• What type of ingredient is used;
• What concentration of mogrosides it contains;
• If it is a decoction, an extract, or a purified ingredient;
• What food use is authorized;
• In which product category it is included.

For a serious brand, this is a mandatory step.

---

Brazzein: sweet proteins are fascinating, but still far from common European use

Brazzein is a sweet-tasting protein, originally identified in the fruit of the African plant Pentadiplandra brazzeana.

It is very interesting because it belongs to the category of so-called "sweet proteins": ingredients that are not sugars but are capable of activating the perception of sweetness.

Its sweetening power is very high, so extremely small quantities are needed.

Why it's interesting

Brazzein has some characteristics that make it fascinating:

• It sweetens at very low dosages;
• It is not a carbohydrate;
• It has a potentially clean sensory profile;
• It can be produced through biotechnological processes;
• It could have applications in beverages, sweet products, and reduced-sugar foods.

In the United States, favorable evaluations already exist for specific brazzein preparations produced by specialized companies.

But beware: this does not mean that any brazzein is automatically usable in any food or in any country.

The practical limit

Brazzein remains a very technical ingredient, still far from common use in European artisanal production.

For the low-carb consumer, it is an interesting name to know, but today it is not a concrete and immediately available solution like erythritol, stevia, or other already authorized mixtures.

It is a technology to observe, not an ingredient to consider already normal in the low-carb pantry.

---

5-KDF or “keto-fructose”: technological promise, but still little present on the market

Another emerging ingredient is the so-called 5-KDF, often also referred to as "keto-fructose."

This is a sweetener developed through biotechnological processes and proposed as a reduced-calorie alternative, with a taste closer to sugar than some intense sweeteners.

Why it's being discussed

The interest stems from some potentially useful characteristics:

• A rounder sweet profile;
• Reduced caloric intake;
• Good compatibility with various food applications;
• Possible use in beverages, desserts, and functional products;
• Production approach based on fermentation and technological innovation.

However, we are still in a very different phase from that of sweeteners already on the European market.

What this means for the consumer

For the Italian consumer today, 5-KDF is primarily an ingredient to observe.

It may become interesting in the future, but it is not yet a common sweetener in low-carb foods available in Europe.

In this case, too, the point is not just "how much it promises," but if and when it will be authorized, available, economically sustainable, and truly useful in food products.

---

Existing sweeteners: more concrete, but not all equal

Alongside emerging sweeteners, there are sweeteners already used for years in the European market.

Here the discussion changes: we are no longer talking about futuristic ingredients, but about authorized, evaluated, and regulated ingredients.

This does not mean that they are all identical or that they should be used indiscriminately.

---

Erythritol: useful, but pay attention to quantities

Erythritol is a polyol widely used in sugar-free and low-carb products.

It has a very low caloric intake, a fairly clean taste, and a reduced glycemic impact compared to sugar. For this reason, it has become one of the most common sweeteners in low-carb and keto recipes.

Its main limitation is technological and digestive.

On the one hand, it can give a fresh sensation in the mouth, which is not always desirable. On the other hand, if consumed in high quantities, it can have gastrointestinal effects, particularly in sensitive individuals.

EFSA has re-evaluated erythritol and has set an acceptable daily intake precisely to protect against laxative effects.

The correct message, therefore, is not: "erythritol yes or erythritol no."

The correct message is: erythritol is a useful, authorized, and very interesting sweetener, but it must be formulated with balance.

---

Stevia: intense, plant-based, but needs careful balancing

Steviol glycosides, commonly associated with stevia, are intense sweeteners authorized in the European Union.

They have a much higher sweetening power than sugar and do not provide significant carbohydrates at usage doses.

Their main limitation is sensory: depending on the quality of the extract, its composition, and dosage, they can leave bitter, herbaceous, or persistent aftertastes.

For this reason, stevia often works better when blended with other sweeteners or bulking agents.

In a good low-carb formulation, stevia can be very useful, but it rarely suffices on its own to achieve a result similar to traditional sugar.

---

Sucralose: authorized, but caution with high-temperature uses

Sucralose is an intense sweetener, widely used in food products and beverages.

It is authorized in the European Union, and EFSA has completed its re-evaluation. The acceptable daily intake has been confirmed.

However, the most delicate issue concerns certain high-temperature applications. EFSA has highlighted uncertainties related to the use of sucralose in specific baking applications or under prolonged heating conditions.

This does not mean that sucralose is "to be avoided" absolutely. It means that, when talking about baked goods, the choice of sweetener must consider not only taste, but also technological stability and actual usage conditions.

---

Acesulfame K, saccharin and neotame: intense sweeteners to be used judiciously

Acesulfame K, saccharin, and neotame are intense sweeteners authorized and re-evaluated by European authorities.

They have a high sweetening power and are used in very small quantities. Precisely for this reason, they do not behave like sugar: they do not provide bulk, they do not provide structure, and they do not perform the same technological functions as sucrose.

However, they can be useful in some formulations, especially when the goal is to achieve sweetness without significantly increasing sugars and carbohydrates.

In the low-carb world, therefore, the question is not simply whether a sweetener is "natural" or "artificial." The more accurate question is:

• Is it authorized?
• Is it used in adequate doses?
• Is it consistent with the type of product?
• Does it really improve the final result?
• Does it allow for maintaining a low carbohydrate content without overly penalizing the taste?

In some sweet products, it may make sense to use intense sweeteners in a mixture, precisely because only minimal quantities are needed and because they can help achieve a more balanced sweet profile.

In other cases, it may be preferable to work with different solutions, such as erythritol, dietary fibers, or mixtures formulated to contribute not only to sweetness but also to texture and mouthfeel.

The choice should not be ideological. It should be formulation-based.

A good low-carb product is not born from the automatic rejection of an ingredient, but from the ability to use it judiciously, in the right dose and in the right context.

Regulations dictate what can be used. Formulation decides how to use it. Positioning decides how to communicate it transparently.

---

The real question: which sweetener is truly needed?

When choosing a low-carb sweetener, a common mistake must be avoided: looking for "the best" overall.

There is no perfect sweetener for everything.

A sweetener can work well in a beverage and poorly in a cookie. It can be valid in a cold cream and unsuitable for a leavened product. It can have a good glycemic profile but a difficult-to-manage aftertaste. Or it can be excellent sensually, but not yet authorized in Europe.

The choice depends on many factors:

• Desired taste;
• Type of product;
• Processing temperature;
• Presence of fiber, protein, or fat;
• Final consistency;
• Dose used;
• Applicable regulations;
• Digestive tolerability;
• Consistency with brand positioning.

 

Natural does not automatically mean better

Another important point concerns the word "natural."

Many consumers look for natural sweeteners because they perceive them as safer or healthier. But this association is not always correct.

A natural ingredient may not be authorized in a certain form. It may have a strong aftertaste. It may be difficult to dose. It may not work in baking. It may require very complex extraction and purification processes.

At the same time, a sweetener that is less "romantic" from a communicative point of view can be more studied, more stable, and more predictable.

The quality of a low-carb product does not depend on a word on the label. It depends on the overall balance of the formulation.

---

What all this means for those following a low-carb diet

For those looking to reduce sugars and carbohydrates, sweeteners can be useful tools.

But they should not become a mental shortcut.

A well-made low-carb product should not just substitute sugar with another sweet ingredient. It should be conceived as a whole: taste, texture, satiety, ingredients, nutritional values, and food pleasure.

This applies to sweets, but also to bread, pizza, pasta, focaccia, and baked goods.

Reducing carbohydrates is only one part of the job. The other part is building a food that works.

---

Conclusion: innovation yes, but with discretion

The world of low-carb sweeteners is rapidly evolving.

Allulose, monk fruit, brazzein, and 5-KDF are interesting ingredients to watch. Some are already used in other markets, others are still under evaluation, and others may play a role in the coming years.

But for those who buy or produce food in Italy, the point remains very concrete: not everything that is promising is already authorized. Not everything that is natural is automatically suitable. Not everything that sweetens well also works in baking or in an artisanal formulation.

For this reason, the best choice is to look at sweeteners with curiosity, but also with caution.

In low-carb, there's no need to chase every new thing. It's about choosing sensible, consistent, and well-formulated ingredients.

This is the difference between a product that is simply "sugar-free" and a well-thought-out low-carb product.