What type of product is commonly used to protect hair from heat damage during styling?

The commonly used product to protect hair from heat damage during styling is a heat protectant spray. This type of spray is specifically formulated to create a barrier between the hair and the heat generated by styling tools such as blow dryers, curling irons, and flat irons. Heat protectants typically contain ingredients that can withstand high temperatures and help to lock in moisture, preventing hair from becoming dry and brittle due to excessive heat exposure.

Using a heat protectant is crucial for maintaining the health of the hair while achieving desired styles, as it minimizes the risk of damage and helps preserve the hair's natural luster. Other products mentioned, such as moisturizers and hair gels, serve different purposes, primarily focused on hydration or styling hold, rather than providing protection against heat. Sunscreen, while important for protecting skin from UV rays, is not designed for hair protection against heat styling tools.