A new study reveals that a common dietary supplement may significantly alter gut microbiome composition in ways that could impact metabolic health. Researchers found that long-term use of the supplement led to noticeable shifts in bacterial populations, with some changes linked to improved insulin sensitivity. The findings suggest potential benefits for individuals with prediabetes or type 2 diabetes, though further investigation is needed to confirm long-term effects. Experts caution that results should not be interpreted as medical advice without consulting a healthcare provider.