Effects of Sexual Activity on Beard Growth in Man


DURING the past two years I have had to spend periods of several weeks on a remote island in comparative isolation. In these conditions I noticed that my beard growth diminished, but the day before I was due to leave the island it increased again, to reach unusually high rates during the first day or two on the mainland. Intrigued by these initial observations, I have carried out a more detailed study and have come to the conclusion that the stimulus for increased beard growth is related to the resumption of sexual activity.

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ANON Effects of Sexual Activity on Beard Growth in Man. Nature 226, 869–870 (1970). https://doi.org/10.1038/226869a0

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