What are the possible effects of using a high pH shampoo?

Using a high pH shampoo can lead to hair becoming dry and brittle primarily because of the nature of high pH levels, which typically ranges above 7. Hair has a natural pH of about 4.5 to 5.5, which helps keep its cuticle smooth and intact. When a shampoo with a high pH is used, it raises the cuticle layer, making it swell and become more porous. This can strip the hair of its natural oils, moisture, and proteins, leading to a lack of hydration. As a result, the hair can become overly dry, lose its elasticity, and may even become brittle, making it prone to breakage.

High pH shampoos may be effective for certain cleansing purposes, particularly in removing heavy product buildup, but they are not ideal for regular use on hair that is already dry or damaged. This makes understanding pH levels crucial in hair care, particularly when selecting products intended to maintain or enhance hair health.