Exogen Hairs in Women with and without Hair Loss

January 2017 in “ Skin appendage disorders ”

Marcella Guarrera, Alfredo Rebora

exogen hairs androgenetic alopecia telogen effluvium AGA TE androgenic alopecia

TLDR Women with and without hair loss have similar amounts of exogen hairs, so these hairs are not a key factor in hair loss conditions.

The study investigated the prevalence of exogen hairs in 25 women, divided into groups of 8 with no hair loss, 5 with androgenetic alopecia (AGA), 9 with telogen effluvium (TE), and 3 with both conditions. It found that exogen hairs made up 2.6% of total hairs in women without hair loss, 5.2% in those with AGA, 6.6% in those with TE, and 2.3% in those with both TE and AGA. The differences were not statistically significant, leading to the conclusion that exogen hairs do not play a significant role in the pathogenesis of AGA and TE.

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