Hair Loss and Zinc Deficiency: A Cross-Sectional Study

This cross-sectional study of 23,975 patients found a statistically significant but clinically insignificant difference in zinc levels between those with hair loss (96 µg/dL) and controls (99 µg/dL), as both were within the normal range. The study also noted lower ferritin and hemoglobin levels in patients with hair loss, but these differences were minor. The findings suggest that routine zinc testing is not necessary in hair loss evaluations, and further research on zinc supplementation is needed to understand its role in hair loss conditions. The study's large sample size provides robust data, but its retrospective nature limits causal conclusions.