A Preliminary Study of the Effect of 11a-Hydroxyprogesterone on Hair Growth in Men Suffering from Androgenetic Alopecia

January 1987 in “ PubMed ”

A. H. van der Willigen, J. D. R. Peereboom-Wynia, T. Van Joost, Ernst Stolz

TLDR The treatment helped promote hair growth in men with androgenetic alopecia.

This preliminary study investigated the effects of a lotion containing 1% 11a-hydroxyprogesterone on hair growth in 10 male patients with androgenetic alopecia over one year, compared to 8 untreated controls. The treated group showed an increase in the number and mean diameter of anagen hair roots and hair roots with a diameter less than 40 microns, while the number of hair roots in catagen/telogen decreased. In contrast, the control group experienced a decrease in anagen hair roots and an increase in catagen/telogen hair roots. The study concluded that the treatment appeared to be effective in promoting hair growth in men with androgenetic alopecia.

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