What is the typical pH range of most shampoos?

The typical pH range of most shampoos is between 4.5 and 7. This range is slightly acidic to neutral, which is important for maintaining the health of hair and scalp. The slightly acidic nature of shampoos helps to preserve the natural balance of the scalp, facilitating optimal moisture levels and ensuring the hair cuticle lies flat.

A pH that is too high, such as in the ranges of 7-8.5 or 8.5-9, can lead to cuticle lifting, making hair more prone to damage, tangling, and dehydration. Likewise, a pH that is too low, such as 3.0-4.5, while beneficial for color-treated hair, can be too harsh for everyday use. Therefore, the range of 4.5 to 7 is ideal for cleansing while still being gentle enough for most hair types.