Box plot illustrating the effect of riboflavin supplementation on the serum glutamine-to-glutamate ratio in diabetic rats. The ends of the boxes depict the 25th and 75th percentiles, with a line at the median, while error bars extend to the 10th and 90th percentiles. Riboflavin supplementation in the drinking water significantly altered the serum glutamine-to-glutamate ratio in diabetic rats with neuropathic pain, with a significant difference found only between the “Diabetic” and “Diabetic + Rf 50 mg” groups. Significant differences compared to the diabetic group (Diabetic) are indicated as *p < 0.05. n=8 animals per group.