Does shaving make hair grow back thicker and darker?
No — the evidence does not support this claim.
Shaving makes hair grow back thicker, darker, and faster.
What the evidence shows
Shaving does not change the thickness, color, or growth rate of hair. It only cuts the hair at the surface, leaving a blunt tip that can feel coarse and look darker as it grows out — because you are seeing the thicker, darker base of the shaft rather than the tapered end. Once the hair grows longer it returns to its original texture. A 1928 study and later research found no measurable difference in regrowth after shaving.
This summary describes a fact-check originally published by Mayo Clinic. FactGuard did not conduct this review; we summarize it and link to the original. Read the original fact-check by Mayo Clinic →
Sources
- Mayo Clinic
- Anatomical Record (1928 study)
- Journal of Investigative Dermatology
Published 2026-06-07 · Last reviewed 2026-06-07
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