Cosmetology Practice Test – Pass the Massachusetts State Board Exam (2026 Guide)

Using a heat protectant before styling serves primarily to protect hair from heat damage. Heat styling tools such as curling irons, straighteners, and blow dryers can reach very high temperatures, which can lead to numerous issues such as dryness, brittleness, and breakage of the hair. A heat protectant acts as a barrier between the hair and the heat, often containing ingredients that help to distribute heat more evenly, reduce moisture loss, and minimize the risk of structural damage to the hair.

Additionally, while some heat protectants may also offer benefits like adding shine or assisting in style retention, these are secondary to their primary function of safeguarding the hair from the harmful effects of heat. The formulation and application of heat protectants are crucial in maintaining the hair's health and integrity during the styling process.