What is the consequence of using an alkaline shampoo on colored hair?

Using an alkaline shampoo on colored hair can lead to the stripping of color from the hair. Alkaline products have a higher pH level, which can open the hair cuticles, making it easier for color molecules to escape. This can result in faded or diminished color, as the shampoo disrupts the color molecules that are bonded within the hair.

Colored hair is typically more vulnerable to damage, and using a product with a high alkalinity can compromise the integrity of the hair shaft, further exacerbating color loss. In contrast, hair care products formulated with a more balanced or acidic pH are generally recommended for maintaining color because they help to seal the cuticle, locking in the color and enhancing overall hair health.