Q: Why is heat styling bad for hair?

Ouidad: Heat styling is bad for hair because it forces the moisture and conditioning elements out of hair. Similar to skin, hair needs to be fed essential nutrients, such as proteins, amino acids, and moisture so it is able to look and perform its best. Heat styling can also cause damage to the hair cuticle, which it causes to lift from the hair shaft. This leads to frizz and can also cause breakage. It is best to let your hair dry on its own if possible.