What effect does heat have on hair styling?

Heat plays a vital role in hair styling, primarily by temporarily altering the hair structure. When heat is applied to hair, the proteins within the hair shaft, especially keratin, respond to the temperature changes. This allows for the breakdown of hydrogen bonds that hold the hair in its natural shape. As a result, hair can be reshaped and styled according to the desired look.

For instance, using tools such as curling irons or flat irons, heat enables the formation of curls, waves, or straight styles that last until the hair is washed or exposed to moisture. This temporary alteration is fundamental to various styling techniques, allowing hairstylists to achieve different effects based on client preferences.

In contrast, while heat can promote certain styles, it doesn't inherently cause frizz in all cases, decrease styling time universally, or have no impact on hair. The outcome largely depends on the techniques and products used alongside heat styling.