The Study
Sucralose consumption modifies glucose homeostasis, gut microbiota, Curli protein, and related metabolites in healthy individuals: a randomized placebo-controlled, triple-blind trial.
This study gave some people sugar-free sweetener and others a fake one, then checked if their blood sugar changed. Because they randomly picked who got what, we can guess the sweetener might have caused the change — but we don’t have all the numbers, so we can’t be 100% sure.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Scientists gave healthy people a common artificial sweetener called sucralose every day for a month to see what it did to their body.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 553 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — a 20% drop in insulin sensitivity means the body has a harder time using insulin to control blood sugar, which could increase diabetes risk over time.
- 2After a month, their insulin sensitivity dropped by 20.3%, their blood sugar and insulin spiked higher after meals, their gut bacteria became less diverse, and their body showed more signs of inflammation.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Clinical nutrition ESPEN
Year
2025
Authors
A. Romo-Romo, M. Sánchez-Tapia, M. López-Carrasco, L. E. Guillén-Pineda, G. Brito-Córdova, Alexandro J. Martagon, Omar Granados Portillo, G. Walther, F. Gómez-Pérez, C. A. Aguilar-Salinas, A. Tovar, Nimbe Torres, Paloma Almeda-Valdés
Related Content
Claims (4)
Consuming saccharin and sucralose for a short time changes gut bacteria and reduces the body's ability to regulate blood sugar in some people, while acesulfame-K and stevia do not produce these effects.
Consuming sucralose for 30 days in healthy lean people is associated with lower gut microbial diversity, higher levels of certain inflammatory proteins and metabolites in the gut and blood, and lower levels of butyrate and glutamic acid.
In healthy lean individuals, consuming sucralose at 30% of the recommended daily limit for 30 days reduces insulin sensitivity by 20.3% during a mixed meal tolerance test.
In healthy lean people, drinking sucralose for 30 days leads to higher levels of glucose, insulin, and GLP-1 in the blood after meals compared to baseline.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.