Hair
What is the primary protein found in hair?
Keratin
Which part of the hair is located beneath the scalp and provides growth?
Hair follicle
What is the natural color of hair determined by?
Melanin
Which layer of the hair is the outermost one?
Cuticle
Which vitamin is essential for hair growth?
Vitamin B7 (Biotin)
What is the main function of sebum in hair?
Moisturizing and protecting the hair
What is the average growth rate of human hair per month?
1.25 centimeters
Which phase is NOT part of the hair growth cycle?
Fusion phase
Gray hair is caused by the loss of which pigment?
Melanin
What is the term for excessive hair loss from the scalp?
Alopecia