Which product is used to neutralize hair after a perm?

The product specifically used to neutralize hair after a perm is a neutralizer. After the perming process, the hair bonds need to be re-formed to maintain the desired curl or wave. The neutralizer acts by stopping the action of the perming solution and setting the new shape into the hair. It typically contains agents that work to stabilize the hair's new structure, ensuring that the curls hold and last over time.

Shampoo, while vital in cleansing the hair, does not serve the purpose of stopping the chemical process initiated by the perm treatment. Conditioner is designed to moisturize and improve the hair's texture but does not have the active ingredients necessary to neutralize the perm chemicals. Moisturizer, although beneficial for hydration, is not intended for use immediately following a perm to stabilize hair; its primary function is to add moisture rather than to secure the hair's new configuration. Therefore, the neutralizer is the most appropriate choice for achieving the intended results after perming.