What is keratin?
Keratin is an important protein that makes up your hair, nails and skin. It is a protective type of protein and is the main building block of your hair. It makes up 90% of your hair. This is what allows your hair to be strong and healthy while being less prone to breakage. Many people believe that their hair will be stronger and appear healthier by taking protein supplements and products. 

How to tell if my hair is protein deficient?
It is pretty simple! There are several ways to identify protein deficient hair, most of them are quite obvious.