Cosmetology Practice Test – Pass the Massachusetts State Board Exam (2026 Guide)

The purpose of a keratin treatment is to smooth and straighten hair by infusing it with keratin, which is a natural protein found in hair, skin, and nails. This treatment works by penetrating the hair shaft with a keratin formula, which helps to fill in gaps and damage in the hair cuticle. As a result, the hair becomes less frizzy, easier to manage, and often exhibits a sleeker appearance. The treatment effectively reduces curl and wave patterns, making it particularly popular among individuals looking for a straighter, more polished look.

While other options mention adding color, enhancing curl patterns, or providing temporary style changes, they do not align with the primary purpose of keratin treatments. The key focus of this treatment is on improving hair texture and manageability, not altering color or promoting curls.