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does shaving stimulate hair growth / hypertrichosis ?

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Does shaving stimulate hair growth / hypertrichosis

It is a common belief, but cutting or shaving hair does not stimulate growth. Hair fiber is dead, if it is cut there is no way for the dead hair to send a signal back to the hair follicle in the skin to grow more hair. The studies to prove hair cutting did not stimulate growth were done back in the 1920s but the belief still persists.

Several studies have been conducted where volunteers shaved half of their beard or scalp hair and left the other half untouched. The shavings were collected and measured and the hair left untouched was also measured. The results showed that the amount of hair produced was exactly the same whether the hair was regularly shaved or not.


Does shaving stimulate hair growth / hypertrichosis references

  • Peereboom-Wynia JD. Effect of various methods of depilation on density of hair growth in women with idiopathic hirsutism. Arch Dermatol Forsch. 1972;243(3):164-76.
  • Lynfield YL, Macwilliams P. Shaving and hair growth. J Invest Dermatol. 1970 Sep;55(3):170-2.
  • Trotter M. Hair growth and shaving. Anat Rec. 1928;37:373-379
  • Seymour RJ. The effect of cutting upon the rate of hair growth. Am J Physiol. 1926;78:93-8
  • Bulliard H. Influence de la section et du rasage repete sur l'evolution du poil. Annales de Dermatologie et de Syphiligraphie. 1923;Series 6:386-91
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