Hair is primarily made of a protein called keratin.
Hair is primarily made of a protein called keratin.
Hair is primarily made of a protein called keratin.
The hard protein that hair is made from is called keratin.
Hair is primarily made up of a protein called keratin.
Hair is primarily made up of a protein called keratin.
Hair is primarily made of a protein called keratin.
Hair is primarily made of a protein called keratin.
The protein that is most abundant in hair is keratin.
The hard protein that hair is made from is called keratin.
Hair is primarily made up of a protein called keratin.
The protein found in hair is called keratin, which is a strong fibrous protein.
Hair is made of a protein called keratin.
Hair is made of protein.
Protein.
The horns of a rhinoceros are made of keratin, the same type of protein that makes up hair and fingernails.
Hair is made of keratin
Hair is made out of keratin, a type of protein that is produced by cells in hair follicles in the skin. These cells divide and differentiate to form hair strands, which are composed primarily of keratin proteins.