Science project

Are the Growth Rates of Hair Different Between Men and Women?


Hair is primarily composed of a protein called keratin. Because it is a protein, it grows quickly as do nails and our skin. You may not see it, but we shed hair and skin cells every day. This of course true for both men and women. But does their hair grow at the same rates? Let's find out. Note that this is an experiment that you will conduct over the course of the entire school year.

Research Questions

  • How fast does men's hair typically grow?
  • How fast does women's hair typically grow?

Terms to Know

  • Hair
  • Keratin
  • Protein
  • Filament


  • Test subjects: At least 50 and 50 women
  • Precision ruler
  • Pen and paper for notes

Experimental Procedure

  1. Separate your test subjects according to gender.
  2. Take a precision ruler and measure the approximate longest strand of hair they have. Jot this down.
  3. Repeat step 2 in weekly intervals for the entire school year.
  4. At the end of the year, tally how much their hair grew between measurements.
  5. Find the average growth rate of the hair of men and the hair of women.
  6. Determine which sex had a faster growth.

Suggested Chart

Test Subject

Week 1
Week 2
Week 3

















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