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 measurable changes in bacterial populations, with some variations linked to improved insulin sensitivity. The findings suggest potential benefits for individuals with prediabetes or metabolic disorders, though the study emphasizes the need for further investigation into long-term effects. Experts caution that supplements should not replace medical advice or a balanced diet.