What is the purpose of using a hair serum?

Using a hair serum serves the dual purpose of providing hydration and adding shine to the hair while effectively taming frizz. Hair serums are typically formulated with silicone-based ingredients or oils that coat the hair strands, creating a protective barrier that locks in moisture. This helps to smooth the hair cuticle, enhancing the overall appearance by making hair look shinier and healthier. Additionally, by mitigating frizz, hair serums can help maintain a polished look, especially in humid conditions or after styling, making them a popular choice in hair care routines.

While the other options touch on different hair care aspects, they do not encapsulate the primary functions of hair serums. For example, protecting the scalp from sunburn is not a function of hair serums, and while some products may enhance color or promote growth, those actions fall outside the primary benefits provided by hair serums.