New Jersey Cosmetology and Hairstyling Practice Exam

Keratin treatment is particularly effective for smoothing frizzy hair due to the way it works to restore the protein structure that frizzy hair often lacks. Keratin is a naturally occurring protein in hair, and when applied as a treatment, it infuses the hair shaft with this protein, helping to fill in gaps and align the hair strands. This process leads to a smoother and shinier appearance by reducing the hair's tendency to frizz, especially in humid conditions.

In contrast, color treatments are primarily focused on changing the hair's pigment and do not inherently address frizz. Deep conditioning treatments can provide moisture and improve the overall health of the hair but may not have a lasting smoothing effect on frizz. Rebonding, while it is used to straighten hair, can lead to a rigid feel rather than a soft, silky finish associated with smoothness. Thus, among the options, keratin treatment stands out as the most targeted solution for frizzy hair.