Multiple choice

What are the two main factors that can initiate hair growth?

  1. hormones & diet

  2. hormones & blood supply

  3. diet & water intake

  4. blood supply & diet

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hair growth is primarily driven by hormonal signals and the availability of nutrients and oxygen delivered via the blood supply to the hair bulb. While diet affects overall health, blood supply is the direct physiological mechanism.