Evolution

• Body hair was originally meant to keep the human body warm, but has been largely bred out of the human population, since clothing now fulfills the purpose.
  
  

Puberty

• Both males and females experience a spike in the male hormone androgen at puberty, which stimulates a number of growth factors. These factors include muscle and hair growth.
  
  

Androgenic Hair

• The follicles that precede leg hair belongs to a family of cells that are considered "androgen sensitive." These include pubic hair, chest hair, vocal chords and reproductive tissues.
  
  

Male vs. Female

• Men tend to have more leg hair than women because they naturally produce more testosterone and androgen.
  
  

Increase

• Androgen stimulating health supplements like Andro-Stack can increase leg hair production and thickness.