What should be applied immediately after perming hair to restore its pH balance?

After perming hair, applying a neutralizing solution is crucial for restoring the pH balance of the hair. Perming involves using chemical solutions to reshape the hair, which tends to shift its pH to a more alkaline state. A neutralizing solution works to bring the hair back to its natural acidic pH, typically around 4.5 to 5.5. This step is vital not only for the effectiveness of the perm but also to ensure the overall health and integrity of the hair.

While a moisturizing conditioner, deep conditioning mask, and hot oil treatment can be beneficial for hydration and conditioning the hair, they do not specifically address the need to neutralize the pH after the chemical process of perming. The primary purpose of a neutralizing solution is to halt the chemical action of the perm and stabilize the hair structure by balancing its pH level, which is why it is the appropriate choice immediately following a perm.