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  • Title: Effects of non-nutritive sweeteners on the BMI of children and adolescents: a systematic review and meta-analysis of randomised controlled trials and prospective cohort studies.
    Author: Espinosa A, Mendoza K, Laviada-Molina H, Rangel-Méndez JA, Molina-Segui F, Sun Q, Tobias DK, Willett WC, Mattei J.
    Journal: Lancet Glob Health; 2023 Mar; 11 Suppl 1():S8. PubMed ID: 36866485.
    Abstract:
    BACKGROUND: Considering the biological variation across subgroups during periods of growth, the role of non-nutritive sweeteners in weight-related outcomes among children and adolescents is unclear. We did a systematic review and meta-analysis to summarise the evidence on experimental and habitual consumption of non-nutritive sweeteners and prospective changes in BMI in paediatric populations. METHODS: We searched eligible (ie, lasting a minimum of 4 weeks) randomised controlled trials of the effect of non-nutritive sweeteners versus non-caloric or caloric comparators on BMI change and prospective cohort studies reporting multivariable-adjusted coefficients for non-nutritive sweetener intake and BMI in children (aged 2-9 years) and adolescents (aged 10-24 years). We generated pooled estimates using random effects meta-analysis and did secondary stratified analyses to explore heterogeneity by study-level and subgroup characteristics. We further evaluated the quality of the included evidence and classified industry-funded studies, or those whose authors were related to the food industry, as having potential conflicts of interest. FINDINGS: From 2789 results, we included five randomised controlled trials (n=1498 participants; median follow-up 19·0 weeks [IQR 13·0-37·5]); three [60%] with potential conflicts of interest), and eight prospective cohort studies (n=35 340 participants; median follow-up 2·5 years [IQR 1·7-6·3]; two [25%] with potential conflicts of interest). Random allocation to intake of non-nutritive sweeteners (25-2400 mg/day, from food and beverages) suggested less BMI gain (standardised mean difference -0·42 kg/m2 [95% CI -0·79 to -0·06]; I2=89%) compared with intake of sugar from food and beverages. Stratified estimates were significant only in adolescents, participants with obesity at baseline, consumers of a mixture of non-nutritive sweeteners, longer trials, and trials not found to have potential conflicts of interest. No randomised controlled trials tested beverages containing non-nutritive sweeteners versus water. Prospective cohorts reported a non-significant association between consumption of beverages containing non-nutritive sweeteners and BMI gain (0·05 kg/m2 [95% CI -0·02 to 0·12]; I2=67%; per daily serving of 355 mL), which was accentuated for adolescents, boys, and cohorts with longer follow-ups. Removing studies with potential conflicts of interest attenuated the estimates. Evidence was predominantly classified as of low to moderate quality. INTERPRETATION: Intake of non-nutritive sweeteners versus sugar in randomised controlled trials resulted in less BMI gain in adolescents and participants with obesity. Better designed studies should contrast beverages containing non-nutritive sweeteners with water. Long-term prospective analyses with changes in repeated measures might clarify the effect of intake of non-nutritive sweeteners on BMI changes in childhood and adolescence. FUNDING: None.
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