A Quantitative Hair Growth Assessment in Female Androgenetic Alopecia During One Year, and Its Modulation by a Topical 5α-Reductase Inhibitor

The study aimed to assess the variation of hair growth in female androgenetic alopecia (AGA) over one year when treated with a topical 5α-reductase inhibitor. The study was conducted on 35 female subjects aged between 23 and 59 years, suffering from AGA grade I or II on the Ludwig scale. The results showed an increase in hair weight during winter time, compared to the baseline untreated period, and a stabilization of hair loss with the test product. The study concludes that hair weight is a sensitive method for evaluating variation of hair loss with seasons and that a topical 5α-reductase inhibitor may counteract hair loss.