What is the recommended pH of hair conditioners?

The recommended pH of hair conditioners is typically between 4 and 6. This range is slightly acidic, which is beneficial for the hair cuticle. When the pH is in this range, it helps to close the cuticle, making the hair smoother, shinier, and more manageable. This acidity also helps to maintain the hair's natural moisture balance and reduces frizz.

Formulating conditioners within this pH range is important because it allows the product to effectively condition the hair without causing damage that can occur with higher pH levels. Many hair concerns, such as damage and porosity, can be exacerbated when products have a pH that is too high (like in the ranges indicated by the other choices).

Overall, maintaining a pH that is close to the natural pH of hair and skin, which is typically around 4.5 to 5.5, is essential for the overall health and appearance of hair.