What is the recommended pH level for hair products used in salons?

The recommended pH level for hair products used in salons falls between 4.5 and 5.5. This range is considered optimal for maintaining the health of the hair and the scalp. Products within this pH range help to keep the hair cuticle smooth, which minimizes damage, enhances shine, and helps to retain moisture. Additionally, a pH level that is slightly acidic helps to keep the scalp’s natural oils balanced, preventing issues such as dryness or unnecessary oiliness.

Using products outside of this range, particularly those that are too alkaline (above 7.5), can lead to the cuticle lifting, making the hair more susceptible to damage, frizz, and breakage. Alkaline products can also disturb the scalp's pH balance, potentially leading to irritation or scalp issues. Conversely, products that are too acidic (below 4.5) may lead to overly taut hair cuticles, which can result in brittleness and vulnerability to damage. Therefore, maintaining a pH level between 4.5 and 5.5 is crucial for optimal hair health and appearance in salon settings.