Effects of oral minoxidil on serum VEGF and hair regrowth in androgenetic alopecia.

Introduction: Androgenetic alopecia (AGA) is a common hair loss condition characterized by follicular miniaturization. Vascular endothelial growth factor (VEGF) plays a key role in promoting angiogenesis and supporting hair follicle growth. Oral minoxidil has been suggested to upregulate VEGF levels, enhancing hair regrowth.

Methods: This prospective study included 50 participants divided into two groups: oral minoxidil (1 mg/day; n = 25) and control (n = 25). Serum VEGF levels were measured at baseline and after 12 weeks of treatment. Hair growth parameters, including hair count, diameter, shedding, and pull test results, were assessed systematically.

Results: Baseline VEGF levels were similar between groups (p = 0.1873). Post-treatment, VEGF levels increased significantly in the minoxidil group (217.88 ± 22.65 pg/ml vs. 142.81 ± 23.14 pg/ml in the control, p < 0.0001). Hair count and diameter improved significantly (p < 0.0001 and p = 0.0040, respectively), with reductions in shedding and pull test results (p < 0.0001). Positive correlations were observed between VEGF and hair count (r = 0.9965), whereas shedding showed negative correlations (r = -0.5374).

Conclusions: Oral minoxidil significantly enhances VEGF levels, promoting hair growth and reducing shedding. VEGF serves as a promising biomarker for assessing treatment effectiveness and understanding the angiogenic mechanisms involved in AGA.