Scientists Link Artificial Sweeteners to Early Puberty in Children: New Study Highlights Risks and Genetic Factors

A recent large-scale study presented at the Endocrine Society’s 2025 annual meeting has found a significant association between the consumption of artificial sweeteners and early puberty in children, especially those with certain genetic predispositions. The research, conducted in Taiwan with over 1,400 adolescents, identified sweeteners such as aspartame, sucralose, glycyrrhizin (a licorice-derived compound), and added sugars as key contributors to central precocious puberty (CPP), a condition where puberty begins unusually early.

Key Findings From the Study

The Taiwan Pubertal Longitudinal Study (TPLS), initiated in 2018, followed 1,407 children and assessed their sweetener intake through validated questionnaires and urine tests alongside genetic profiling. Researchers diagnosed 481 participants with central precocious puberty based on clinical exams, hormone measurements, and scans. The study revealed dose-dependent relationships where higher consumption of certain sweeteners increased the risk of early puberty. Sucralose was particularly linked to CPP in boys, while girls showed heightened risk from multiple sweeteners including sucralose, glycyrrhizin, and added sugars. These findings held independently of genetic factors, indicating both sweetener exposure and genetic predisposition were important but did not multiply risk synergistically.

Expert Perspectives on Mechanisms and Implications

Dr. Yang-Ching Chen, the lead researcher, explained that artificial sweeteners might disrupt normal puberty timing by influencing hormonal pathways and gut microbiota. For instance, acesulfame potassium (AceK) has been shown in cell and animal studies to activate brain pathways that trigger puberty-related hormones and stress molecules. Glycyrrhizin affects the gut bacterial balance and gene activity related to puberty onset. “This research underscores the powerful impact diet—especially sweetener consumption—may have on child development,” Dr. Chen noted. The study’s findings highlight gender-specific vulnerabilities, suggesting that biological sex influences how dietary chemicals interact with puberty-related hormonal processes.

The research carries critical public health implications as early puberty is associated with emotional stress, shorter adult stature, and increased risks for metabolic and reproductive disorders later in life. Screening for genetic risk and moderating sweetener intake could aid in preventing early puberty and its long-term health consequences, creating new opportunities for pediatric dietary guidelines and risk assessment tools.

Context and Background on Early Puberty and Artificial Sweeteners

Central precocious puberty, marked by the onset of secondary sexual characteristics before age 8 in girls and age 9 in boys, is increasingly reported globally. While genetics play a fundamental role, environmental factors such as diet can modulate the timing of puberty. Artificial sweeteners, widely used as sugar substitutes in processed foods, beverages, and even some oral care products, have raised safety concerns in children due to their potential hormonal effects. Previous scientific investigations showed that some of these sweeteners are not biologically inert and can influence endocrine systems.

Limitations and Counterarguments

Despite the robust dataset and clinical assessments, limitations include the observational nature of the study, which cannot definitively establish causality. Also, the genetic risk scores derived from 19 puberty-related genes represent only part of the complex genetic landscape influencing puberty timing. Some experts caution that while the findings warrant attention, further studies across diverse populations and with controlled interventions are needed to confirm mechanisms and long-term outcomes. Additionally, the interplay between different dietary components and lifestyle factors may add complexity.

Practical Implications for Readers

Parents and caregivers should be mindful of children’s consumption of products containing artificial sweeteners and added sugars, especially if there is a family history of early puberty or endocrine disorders. Reducing intake of sweetened beverages, sugar-free snacks, and processed foods with these additives may support healthier development. Pediatricians might consider dietary assessments and genetic risk screening as part of early puberty evaluation. Public health policies could evolve to incorporate these findings, potentially advocating stricter regulations and consumer education about sweetener use in children’s diets.

Medical Disclaimer: This article is for informational purposes only and should not be considered medical advice. Always consult with qualified healthcare professionals before making any health-related decisions or changes to your treatment plan. The information presented here is based on current research and expert opinions, which may evolve as new evidence emerges.

References