Which of the following treatments is typically used for hair straightening?

Keratin treatment is a popular and effective method for hair straightening. It involves the application of a keratin-based formula to the hair, which helps to smooth the hair cuticles and reduce frizz. The process often includes the use of heat to seal the treatment into the hair, resulting in a straighter, shinier, and more manageable finish.

In contrast, hot oil treatments primarily aim to moisturize and nourish hair but do not have a straightening effect. Protein treatments strengthen the hair by filling in gaps in the hair structure, but they are not specifically designed for straightening. Deep conditioning treatments focus on hydration and repairing the hair’s health, but again, they do not provide a straightening outcome. Thus, keratin treatment stands out as the treatment specifically targeted for achieving sleek, straight hair.