Sugar vs Sweeteners is a question many people face when trying to make a healthier choice
Sugar vs Sweeteners: The 2023 WHO Guideline that changed the conversation
In May 2023, the World Health Organization issued a conditional recommendation against using non-nutritive sweeteners for weight control or disease prevention. The evidence review behind it found no long-term benefit for reducing body fat.
“The systematic review found that NSS use does not confer any long-term benefit in reducing body fat in adults or children.” — WHO Guideline Summary, 2023
Because the certainty of evidence was rated low, WHO’s recommendation is conditional rather than absolute, and it explicitly excludes people who already have diabetes.
Aspartame’s cancer classification, explained
Two months later, the International Agency for Research on Cancer classified aspartame as “possibly carcinogenic to humans” (Group 2B) — a hazard classification based on limited evidence. At the same time, the joint FAO/WHO expert committee left the acceptable daily intake unchanged at 40 mg/kg body weight.
For a 70 kg adult, that threshold works out to roughly 9–14 cans of diet soda per day before exceeding it.
Erythritol and xylitol: an active scientific debate
Sugar alcohols marketed as “natural” alternatives have drawn fresh scrutiny. A 2023 Nature Medicine study linked higher plasma erythritol to a 1.80–2.21 times higher risk of major cardiovascular events, and lab work showed increased platelet clotting activity after erythritol intake, with elevated plasma levels persisting for more than two days after a single dose. A 2024 European Heart Journal study found a comparable pattern for xylitol (HR 1.57 for the highest tertile), with the same research group demonstrating enhanced platelet reactivity in follow-up experiments.
“Erythritol is both associated with incident MACE risk and fosters enhanced thrombosis.” — Witkowski et al., Nature Medicine, 2023
Why this isn’t the final word
Both studies were observational, conducted in patients already being evaluated for cardiac risk — not the general population — and other researchers have published formal critiques of the statistical modeling in the same journal, including questions about how the exposure thresholds were defined. The study authors themselves called for further research into long-term safety rather than presenting their findings as conclusive. This remains genuinely unresolved, which is exactly why it deserves careful framing rather than a scary headline treatment.
Where these sweeteners hide, and what looks safer
Erythritol and xylitol aren’t limited to diet soda — they’re common in keto-friendly baked goods, protein bars, sugar-free gum, and monk-fruit blends, precisely because they mimic sugar’s taste and texture better than most alternatives. If you rely on low-carb products, it’s worth checking labels rather than assuming “sugar-free” is a blanket reassurance. Stevia, meanwhile, looks comparatively reassuring: recent meta-analyses haven’t found clear adverse effects on blood glucose or HbA1c. The takeaway isn’t that all sweeteners are equally risky or equally safe — it’s that the category is genuinely heterogeneous.
What this means for you
The American Diabetes Association’s 2025 Standards of Care recommend nonnutritive sweeteners as a moderate, short-term substitute for sugar-sweetened products in people with or at risk for diabetes — while emphasizing that water remains the preferred choice and that sweeteners alone don’t produce weight loss without calorie reduction. In practice: occasional use is reasonable for most healthy adults, diabetes management can lean on short-term substitution deliberately, and anyone with cardiovascular disease should be more selective about sugar-alcohol-sweetened products specifically and loop in their physician.
References WHO (2023); IARC/JECFA (2023); Debras et al., PLOS Medicine (2022); Witkowski et al., Nature Medicine (2023) and European Heart Journal (2024); ADA Standards of Care (2025). Full citations in BLOCK 11.
Disclaimer This post is for general educational purposes only and is not a substitute for professional medical advice. Speak with your physician about your individual health situation.
Suggested tags: sweeteners, aspartame, erythritol, xylitol, diabetes, WHO guidelines, sugar substitutes, cardiovascular health
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