Colorado Cosmetology Written Practice Exam

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Which of the following is not a type of relaxer?

Ammonium thioglycolate relaxers
Guanidine hydroxide relaxers
Lanthionine relaxers
Sodium hydroxide relaxers

The correct answer is: Lanthionine relaxers

Lanthionine relaxers are often not categorized as a type of relaxer in the traditional sense used in cosmetology. Instead, they are products that can result from the neutralization process of certain types of relaxers, such as sodium hydroxide. This is a chemical process that occurs when the relaxer breaks down the disulfide bonds in the hair and then neutralizes those bonds. In contrast, ammonium thioglycolate, guanidine hydroxide, and sodium hydroxide are all widely recognized as types of chemical relaxers. They are specifically formulated to alter hair structure and achieve straightening through their unique chemical actions. Understanding the differences in these products is essential for safe and effective hair treatments.