What is a distinguishing feature of a "no-lye" relaxer?

A distinguishing feature of a "no-lye" relaxer is that it contains calcium hydroxide or guanidine hydroxide. These ingredients are fundamental to the formulation of no-lye relaxers, which are specifically designed to be less irritating to the scalp than traditional lye relaxers that use sodium hydroxide. The presence of these compounds allows for hair straightening without the harsh effects associated with lye relaxers, making them a popular choice for individuals with sensitive scalps.

While no-lye relaxers can be gentler, it's important to note that they still require careful handling due to the potential for hair damage if used improperly. They offer a distinct chemical profile compared to lye relaxers, and understanding this is crucial for professionals in the beauty industry when recommending suitable hair treatments for various hair types and conditions.