# The Impact of Artificially Sweetened Drinks on Metformin Efficacy

## TL;DR

This pilot study explores whether artificially sweetened drinks affect how well metformin works in treating pediatric obesity and prediabetes.

## Contribution

The study investigates the potential impact of non-nutritive sweeteners on metformin efficacy through GDF-15 and insulin resistance in children.

## Key findings

- The USB group showed a greater decrease in BMI and increase in GDF-15, but differences were not statistically significant.
- More participants in the USB group showed improvements in insulin resistance, though results lacked statistical power.

## Abstract

Background: Artificially sweetened beverages (ASBs) are commonly recommended as a substitute for sugar-sweetened beverages (SSBs) in dietary counseling. Childhood obesity, associated with comorbidities like type 2 diabetes (T2D), has risen alongside increased consumption of both SSBs and ASBs. Metformin, a common treatment for pediatric T2D, affects GDF-15, a hormone involved in weight regulation. This pilot study examines the impact of ASBs on the therapeutic effects of metformin in pediatric patients with obesity and prediabetes, focusing on growth differentiation factor 15 (GDF-15) as a potential mediator. Methods: Forty-six children aged 10–21 years were randomized into two groups: one consuming non-sweetened beverages (USB) and the other consuming ASBs during a 12-week metformin intervention. Results: While the USB group showed a greater decrease in the point estimate for mean BMI (−0.55 ± 1.49 USB vs. −0.23 ± 1.60 ASB) and an increase in the point estimate for mean GDF-15 (33.40 ± 58.34 in USB vs. 19.77 ± 85.87 in ASB), these differences were not statistically significant (p = 0.6). As a hypothesis-generating exercise, change in insulin resistance was explored. While again lacking statistical power, we observed that more participants in the USB group showed improvements in insulin resistance. Conclusions: Additional studies are needed to fully elucidate the impact of non-nutritive sweeteners on metabolic health and treatment outcomes in pediatric obesity.