What is the appropriate pH range for hair products?

The appropriate pH range for hair products is between 4.5 and 5.5. This range is optimal for maintaining the health and integrity of the hair and scalp. Hair and scalp typically have a natural pH level around 4.5 to 5.5, which is slightly acidic. This acidity helps keep the hair cuticle closed and tightly sealed, preventing moisture loss and protecting the hair from environmental damage.

Products formulated within this pH range are less likely to disrupt the natural acid mantle of the scalp and hair, which is important for preventing issues such as dryness, irritation, and excessive oil production. Formulating hair products with a pH that is too high, such as that in the options which suggest ranges above 5.5, can lead to hair becoming porous and more susceptible to damage over time. Conversely, products with a significantly lower pH may be too harsh, causing the cuticle to tighten excessively, which can lead to breakage.

It's crucial for hair care products to strike this balance in pH to ensure optimal hair health and maintain its natural shine and strength.