Sweeteners — sugars, non-sugar sweeteners, and sugar alcohols

A sweetener is any substance added to food to give a sweet taste. This is NakedCalorie's reference to the four sweetener families that dominate the modern food label — added sugars, high-intensity non-sugar sweeteners, plant-derived extracts, and sugar alcohols — with regulatory status, evidence, and how each family lands in the food-quality score.

What is a sweetener?

A sweetener is any food ingredient whose primary technological function is to deliver sweet taste. The category spans caloric carbohydrates that have been part of the human diet for millennia, plant-derived molecules purified into gram-per-kilogram intensity, and synthetic molecules with no natural analogue.

Food regulators split the category by intent, not by chemistry. The US FDA distinguishes nutritive sweeteners (sucrose, glucose, fructose, honey, maple syrup, HFCS, sugar alcohols) from non-nutritive sweeteners (aspartame, sucralose, saccharin, acesulfame-K, steviol glycosides, monk fruit extract, neotame, advantame). The EU uses the same functional split but codes every non-sugar sweetener with an E-number under Regulation (EC) No 1333/2008 and requires a specific labelling statement — "with sweetener(s)" or "with sugar and sweetener(s)."

The reason the category matters as a category, not as isolated molecules, is that sweeteners share a demand profile: they exist because consumers reward sweetness. Every sweetener that reaches supermarket scale — from cane sugar to reb M — is a supply-side answer to that demand. The health question is which combination of price, calories, glycemic effect, and long-term evidence you accept.

The four sweetener families

Every sweetener on a US or EU label belongs to one of four families: added sugars, high-intensity non-sugar sweeteners, plant-derived extracts, and sugar alcohols (polyols). The families differ in energy density, glycemic effect, regulatory framework, and how NOVA classifies their use.

1. Added sugars. Sucrose, glucose, fructose, dextrose, maltose, high-fructose corn syrup, invert sugar, honey, maple syrup, agave syrup, cane juice, rice syrup, and dozens of other named sugars. All are mono- or disaccharides, all deliver ~4 kcal/g, all raise blood glucose (fructose indirectly via hepatic metabolism). Regulated as food ingredients, not additives. See high-fructose corn syrup and added sugar.
2. High-intensity non-sugar sweeteners. Aspartame, sucralose, saccharin, acesulfame-K, neotame, advantame, cyclamate. Synthetic molecules 200–20,000× sweeter than sucrose. Regulated as food additives with defined Acceptable Daily Intakes. See aspartame, sucralose, acesulfame-K, and saccharin.
3. Plant-derived high-intensity sweeteners. Steviol glycosides (from Stevia rebaudiana), mogrosides (from monk fruit, Siraitia grosvenorii), thaumatin (from katemfe fruit), brazzein. Also 200–300× sweetness. Regulated as additives despite plant origin. See stevia and monk fruit.
4. Sugar alcohols (polyols). Erythritol, xylitol, sorbitol, mannitol, maltitol, isomalt, lactitol, allulose (technically a rare sugar, not a polyol, but regulated similarly in the US). Bulk sweeteners with reduced glycemic impact and calories. Listed separately on the US Nutrition Facts panel. See sugar alcohols, erythritol, xylitol, and allulose.

Sweetness intensity, ADIs, and everyday exposure

Sweetness is measured relative to a 10% sucrose solution. The high-intensity sweeteners deliver perceived sweetness in the mg-per-serving range, which is why a diet cola contains ~180 mg aspartame but a regular cola contains ~39 g sucrose — a mass difference of ~200×.

The ADI framework was designed for food additives, so bulk sweeteners like sucrose and the polyols have none. That is not a safety statement — it means the toxicological programme that produced ADIs was aimed at low-dose molecules with narrow uses, not carbohydrates consumed in gram quantities. Sugar alcohols instead carry a European labelling requirement ("excessive consumption may produce laxative effects") triggered by loose-stool thresholds observed in feeding studies.

The 2023 WHO guideline on non-sugar sweeteners

In May 2023 the World Health Organization released a conditional recommendation against the use of non-sugar sweeteners for weight control. The guideline was based on a systematic review by Rios-Leyvraz & Montez covering 283 studies including 50 RCTs and 97 prospective cohorts.

The core findings: pooled RCTs showed a modest short-term reduction in body weight and BMI when non-sugar sweeteners replaced sugar. Pooled prospective cohorts showed the opposite direction — higher non-sugar-sweetener intake was associated with higher body weight (BMI +0.14 per additional serving/day), higher type-2 diabetes incidence (RR 1.23), higher cardiovascular disease mortality (RR 1.19), and higher all-cause mortality (RR 1.12). WHO's interpretation was that RCTs capture the substitution effect while cohorts capture the long-term dietary pattern, and that the pattern signal outweighs the short-term substitution benefit.

The FDA and EFSA did not change their approvals in response. JECFA (the WHO/FAO joint expert committee on food additives) reviewed aspartame two months later and reaffirmed its ADI. The result is a coexisting-guidance landscape: additive approvals rest on toxicology; dietary guidance rests on outcomes.

Aspartame and the July 2023 IARC Group 2B decision

The International Agency for Research on Cancer classified aspartame as "possibly carcinogenic to humans" (Group 2B) on 14 July 2023, based on limited evidence for hepatocellular carcinoma in humans and limited evidence in experimental animals. On the same day JECFA reaffirmed the acceptable daily intake at 40 mg/kg body weight per day.

Group 2B is the same tier as aloe vera whole-leaf extract, ginkgo biloba extract, and pickled vegetables. It captures agents where the evidence is not sufficient to move them into Group 2A ("probably carcinogenic") or Group 1 ("carcinogenic to humans"). The IARC review was hazard identification: does this agent have the capacity to cause cancer under any exposure? JECFA's review was risk assessment: does typical human exposure exceed a safe intake?

NakedCalorie surfaces aspartame with the current IARC/JECFA status on the individual entry. It is not treated as unsafe — the FDA, EFSA, and JECFA continue to approve it — but it is not treated as inert. See aspartame for the full evidence log.

Sugar alcohols and the Witkowski cardiovascular signals

Sugar alcohols were long regarded as metabolically inert — reduced calories, negligible glycemic effect, dental non-cariogenicity. Two Nature Medicine papers in 2023 and 2024 reopened the question for erythritol and xylitol specifically.

Witkowski et al. (Nature Medicine, February 2023) reported that circulating erythritol was associated with major adverse cardiovascular events (MACE) at 3-year follow-up in three cohorts totalling ~4,000 patients. In an interventional arm, eight healthy volunteers ingested 30 g erythritol — the amount in a keto-labelled dessert serving — and showed elevated platelet reactivity for 2–3 days. Witkowski et al. (Nature Medicine, August 2024) reported the same pattern for xylitol: association with MACE in ~3,300 patients and platelet activation after a 30 g oral dose.

Both signals are observational plus mechanistic; neither is a randomised outcome trial. Endogenous erythritol production from glucose via the pentose phosphate pathway confounds the association direction. The EFSA reviewed the evidence in September 2023 and did not restrict use. NakedCalorie flags erythritol and xylitol with the current evidence but does not remove them from the polyol category. See erythritol and xylitol.

Added sugar and the WHO free-sugar cap

The 2015 WHO Guideline: Sugars intake for adults and children recommends limiting free sugars to less than 10% of total energy intake (strong recommendation) with a conditional further reduction to below 5%. Free sugars include all mono- and disaccharides added to foods plus sugars naturally present in honey, syrups, fruit juices, and fruit-juice concentrates.

The Malik et al. 2022 Nature Reviews Endocrinology meta-analysis pooled prospective evidence on sugar-sweetened beverage intake: each additional serving/day was associated with a 27% higher risk of type-2 diabetes (13 cohorts) and an 8% higher risk of cardiovascular disease (10 cohorts). The US 2016 Nutrition Facts revision added a mandatory Added Sugars line and a %DV based on a 50 g reference intake (10% of a 2,000 kcal diet). The 2019–2020 NHANES cycle put mean US added-sugar intake at 68 g/day — 14% of energy on average, roughly 40% above the WHO cap.

NakedCalorie's added-sugar penalty is calibrated to the WHO thresholds, per serving. See added sugar for the full methodology.

US vs EU regulatory status

The US uses a mixed GRAS/food-additive framework where sweeteners can enter the market either via an FDA food-additive approval or via manufacturer self-affirmed GRAS. The EU requires positive pre-market approval by EFSA for every non-sugar sweetener under Regulation (EC) No 1333/2008 and re-evaluates them on a rolling schedule.

How does NakedCalorie score sweeteners?

Sweeteners enter the food-quality score through three channels: the NOVA classifier, the added-sugar penalty, and the additive-load tally.

1. NOVA trigger. Any non-sugar sweetener on the ingredient list — including stevia and monk fruit — moves the product to NOVA Group 4 by the Monteiro 2019 markers. This is the same rule NakedCalorie applies for any high-intensity sweetener regardless of botanical origin.
2. Added-sugar penalty. Per-serving added sugar is scored against WHO thresholds. A single 12 oz sugar-sweetened beverage delivers ~39 g added sugar — 78% of the US %DV — and takes the maximum penalty. Sugars naturally present in intact fruit or milk are exempt.
3. Additive-load tally. Each distinct sweetener adds to the additive count. Sugar alcohols count once as a class. Products blending three or more sweeteners (common in "sugar-free" desserts) score worse than single-sweetener formulations.

The score is deliberately conservative: it never marks a sweetener unsafe, because "unsafe" is a regulator's determination. It marks products as more or less formulated around sweetness, and lets users decide their own line. See What's Inside for the full methodology.

Browse every article in this hub

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  Aspartame

  The sweetener behind most diet sodas. What it is, its 2023 IARC classification, and how regulators currently treat it.

  8 min read

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  Sucralose

  A chlorinated sugar molecule the body doesn't metabolize. What the human evidence actually shows on gut health, glucose response, and safety.

  7 min read

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  High-fructose corn syrup (HFCS)

  The industrial sweetener behind most sweetened drinks in the US. What it is, how it differs from sugar, and what the evidence says.

  7 min read

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  Stevia (steviol glycosides)

  The plant-derived non-sugar sweetener with a modern regulatory footprint — and why NOVA still flags the purified extract as ultra-processed.

  7 min read

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  Monk fruit (mogrosides)

  The other 'natural' non-sugar sweetener — same NOVA Group 4 status, different regulatory footprint on either side of the Atlantic.

  6 min read

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  Sugar alcohols (polyols)

  The bulk sweeteners behind sugar-free gum, low-carb baked goods, and 'no sugar added' ice cream — and their honest GI trade-off.

  8 min read

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  Acesulfame potassium (Ace-K, E950)

  The heat-stable synthetic sweetener behind most 'zero' beverages — usually blended with sucralose to hide the finish.

  6 min read

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  Saccharin (E954)

  The oldest artificial sweetener, cleared of its cancer warning in 2000 — and still a workhorse in tabletop sachets and drug formulations.

  6 min read

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  Allulose (D-psicose)

  The 'rare sugar' that tastes and behaves like sucrose in baking, is nearly calorie-free, but is legal in the US and not in the EU.

  7 min read

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  Erythritol (E968)

  The workhorse bulk sweetener behind stevia, monk fruit, and keto baking — and the subject of a 2023 Nature Medicine cardiovascular signal that regulators are still weighing.

  7 min read

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  Xylitol (E967)

  The dental-caries-cutting polyol behind sugar-free gum — with a real cardiovascular signal on the 2024 evidence and a genuine risk to dogs.

  7 min read