This straightening technique uses keratin, a natural protein present in every hair strand, to give them strength and elasticity. Liquid keratin is injected into the hair fibers after opening the cuticles, and then the cuticles are sealed using a heat treatment. Brazilian straightening goes beyond simply straightening the hair, it is also an important process for maintaining and restoring hair health. Damage from time and styling can weaken the hair, but Brazilian straightening strengthens it and makes styling easier. Additionally, unlike some hair treatments that use harmful chemicals, keratin poses no risk to the hair or health.